Hi,

Hope you're all well, I'm in the process of trying to roll out a policy that disables pst creation, and disables users adding to psts.

As a side effect this policy is also applied to the ost.

Is there any way to limit the policy to only the pst and not the ost?

Many Thanks

Hi,

This answers your question: http://blogs.interfacett.com/how-use-group-policy-disable-pst-file-use-outlook-2010

Note: There are GP policies for other Office versions as well. Just download and use the one you need.

M.

• Edited by MStoppl 21 hours 8 minutes ago
• Proposed as answer by MStoppl 20 hours 29 minutes ago

Exchange administrator, it is possible to restrict the ability to use PST files.  There are two settings available, and both can be applied using Group Policy registry changes PSTDisableGrow and DisablePST. PSTDisableGrow prevents new data being added to existing PST files, and DisablePST prevents users creating or opening PST files altogether.

Description	Registry Path	Registry Value
Disable PST files	HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook	DisablePST
Prevent PST file growth	HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook\PST	PstDisableGrow

Table - PST Restriction Registry Values

Note: The registry paths are specific to Outlook versions 12.0 refers to Outlook 2007, the registry path for Outlook 2003 would be ...\Office\11.0\Outlook and so on.

In an environment where PST files already exist, these settings can be applied separately or together to phase out their use.  The first step could be to implement restrictions on the growth of PST files using PSTDisableGrow which would allow users to access existing data but not allow it to be added to.  Subsequently, all PST file use could be disabled by implementing DisablePST.

In a new Exchange environment, or one where PST files are not used (and the Exchange administrator wants to keep it that way), the DisablePST setting can be applied on its own to stop users being able to add PST files to Outlook.

In any Exchange environment it is probably worth considering implementing a server-side archiving solution before disabling PST files.  Server-side archiving has many benefits compared to PST files, and as many users are determined to keep large quantities of historic e-mail it is better to have a managed solution than unmanaged ad-hoc PST file use a scenario often know as PST hell.

If you are ready to disable PST file use the settings can be applied to Outlook 2007 with Group Policy using the Office 2007 Group Policy Administrative Templates.

Applying PST Group Policy for Outlook 2007

1. Download the Office 2007 ADM Templates and extract the files

http://www.microsoft.com/downloads/details.aspx?FamilyID=92d8519a-e143-4aee-8f7a-e4bbaeba13e7&displaylang=en

2. Launch the Group Policy Management Console, click Start -> Administrative Tools -> Group Policy Management

3. Expand the Forest, Domains, and domain containers then select "Group Policy Objects" 

4. Right-click Group Policy Objects and select New.  Give the new GPO a name, for example PST Policy, and click OK.  (Skip this step if you want to add these settings to an existing GPO.)

5. Right-click PST Policy (or the existing policy you wish to edit)and choose Edit 

6. Expand User Configuration, right-click Administrative Templates and choose Add/Remove Templates

7. Click the Add button and browse to the location of the files extracted in step 2.  Open the ADM folder and the appropriate language subfolder (en-us for English), select the file named outlk12.adm and click Open

8. Click Close to close the Add/Remove Templates dialogue box

9. Expand User Configuration\Administrative Templates\Microsoft Office Outlook 2007\Miscellaneous\PST Settings

10. To implement the DisablePST restriction enable the Prevent users from adding PSTs to Outlook profiles... setting and set the option to Only Sharing-Exclusive PSTs can be added.  This will allow PST files for application such as SharePoint lists, but will prevent user-created PST files from being added.

11. To implement the PSTDisableGrow restriction enable the Prevent users from adding new content to existing PST files. setting. If the PSTDisableGrow setting is implemented users will still be able to create and open PST files, but they will not be able to add any data to any PST files. If they try they will receive this error message:

If the Disable PST setting is implemented the user will see changes in the Outlook user interface.  While any PST files which were already loaded will remain part of the profile, the options to create new PST files or to open any other existing PST files will no longer be in the menu.  Archive options will also be removed.

Disable PST implemented

PST files can be a headache for Exchange administrators, but they dont have to be.  With easily-applied Group Policy settings the use of PST files can be limited, and the problems they cause can be eradicated. 

• Proposed as answer by Vikrant Wakchaure 20 hours 34 minutes ago

Hi,

Hope you're all well, I'm in the process of trying to roll out a policy that disables pst creation, and disables users adding to psts.

As a side effect this policy is also applied to the ost.

Is there any way to limit the policy to only the pst and not the ost?

Many Thanks

• Merged by Melon Chen CHNMicrosoft contingent staff, Moderator 46 minutes ago duplicate

Hi,

Hope you're all well, I'm in the process of trying to roll out a policy that disables pst creation, and disables users adding to psts.

As a side effect this policy is also applied to the ost.

Is there any way to limit the policy to only the pst and not the ost?

Many Thanks

• Merged by Melon Chen CHNMicrosoft contingent staff, Moderator Tuesday, July 07, 2015 6:41 AM duplicate

Hi,

Hope you're all well, I'm in the process of trying to roll out a policy that disables pst creation, and disables users adding to psts.

As a side effect this policy is also applied to the ost.

Is there any way to limit the policy to only the pst and not the ost?

Many Thanks

• Merged by Melon Chen CHNMicrosoft contingent staff, Moderator Tuesday, July 07, 2015 6:41 AM duplicate

Hi,

This answers your question: http://blogs.interfacett.com/how-use-group-policy-disable-pst-file-use-outlook-2010

Note: There are GP policies for other Office versions as well. Just download and use the one you need.

M.

• Edited by MStoppl Friday, June 26, 2015 10:19 AM
• Proposed as answer by MStoppl Friday, June 26, 2015 10:59 AM

Hi,

This answers your question: http://blogs.interfacett.com/how-use-group-policy-disable-pst-file-use-outlook-2010

Note: There are GP policies for other Office versions as well. Just download and use the one you need.

M.

• Edited by MStoppl Friday, June 26, 2015 10:19 AM
• Proposed as answer by MStoppl Friday, June 26, 2015 10:59 AM

Exchange administrator, it is possible to restrict the ability to use PST files.  There are two settings available, and both can be applied using Group Policy registry changes PSTDisableGrow and DisablePST. PSTDisableGrow prevents new data being added to existing PST files, and DisablePST prevents users creating or opening PST files altogether.

Description	Registry Path	Registry Value
Disable PST files	HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook	DisablePST
Prevent PST file growth	HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook\PST	PstDisableGrow

Table - PST Restriction Registry Values

Note: The registry paths are specific to Outlook versions 12.0 refers to Outlook 2007, the registry path for Outlook 2003 would be ...\Office\11.0\Outlook and so on.

In an environment where PST files already exist, these settings can be applied separately or together to phase out their use.  The first step could be to implement restrictions on the growth of PST files using PSTDisableGrow which would allow users to access existing data but not allow it to be added to.  Subsequently, all PST file use could be disabled by implementing DisablePST.

In a new Exchange environment, or one where PST files are not used (and the Exchange administrator wants to keep it that way), the DisablePST setting can be applied on its own to stop users being able to add PST files to Outlook.

In any Exchange environment it is probably worth considering implementing a server-side archiving solution before disabling PST files.  Server-side archiving has many benefits compared to PST files, and as many users are determined to keep large quantities of historic e-mail it is better to have a managed solution than unmanaged ad-hoc PST file use a scenario often know as PST hell.

If you are ready to disable PST file use the settings can be applied to Outlook 2007 with Group Policy using the Office 2007 Group Policy Administrative Templates.

Applying PST Group Policy for Outlook 2007

1. Download the Office 2007 ADM Templates and extract the files

http://www.microsoft.com/downloads/details.aspx?FamilyID=92d8519a-e143-4aee-8f7a-e4bbaeba13e7&displaylang=en

2. Launch the Group Policy Management Console, click Start -> Administrative Tools -> Group Policy Management

3. Expand the Forest, Domains, and domain containers then select "Group Policy Objects" 

4. Right-click Group Policy Objects and select New.  Give the new GPO a name, for example PST Policy, and click OK.  (Skip this step if you want to add these settings to an existing GPO.)

5. Right-click PST Policy (or the existing policy you wish to edit)and choose Edit 

6. Expand User Configuration, right-click Administrative Templates and choose Add/Remove Templates

7. Click the Add button and browse to the location of the files extracted in step 2.  Open the ADM folder and the appropriate language subfolder (en-us for English), select the file named outlk12.adm and click Open

8. Click Close to close the Add/Remove Templates dialogue box

9. Expand User Configuration\Administrative Templates\Microsoft Office Outlook 2007\Miscellaneous\PST Settings

10. To implement the DisablePST restriction enable the Prevent users from adding PSTs to Outlook profiles... setting and set the option to Only Sharing-Exclusive PSTs can be added.  This will allow PST files for application such as SharePoint lists, but will prevent user-created PST files from being added.

11. To implement the PSTDisableGrow restriction enable the Prevent users from adding new content to existing PST files. setting. If the PSTDisableGrow setting is implemented users will still be able to create and open PST files, but they will not be able to add any data to any PST files. If they try they will receive this error message:

If the Disable PST setting is implemented the user will see changes in the Outlook user interface.  While any PST files which were already loaded will remain part of the profile, the options to create new PST files or to open any other existing PST files will no longer be in the menu.  Archive options will also be removed.

Disable PST implemented

PST files can be a headache for Exchange administrators, but they dont have to be.  With easily-applied Group Policy settings the use of PST files can be limited, and the problems they cause can be eradicated. 

• Proposed as answer by Vikrant Wakchaure Friday, June 26, 2015 10:54 AM

Exchange administrator, it is possible to restrict the ability to use PST files.  There are two settings available, and both can be applied using Group Policy registry changes PSTDisableGrow and DisablePST. PSTDisableGrow prevents new data being added to existing PST files, and DisablePST prevents users creating or opening PST files altogether.

Description	Registry Path	Registry Value
Disable PST files	HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook	DisablePST
Prevent PST file growth	HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook\PST	PstDisableGrow

Table - PST Restriction Registry Values

Note: The registry paths are specific to Outlook versions 12.0 refers to Outlook 2007, the registry path for Outlook 2003 would be ...\Office\11.0\Outlook and so on.

In an environment where PST files already exist, these settings can be applied separately or together to phase out their use.  The first step could be to implement restrictions on the growth of PST files using PSTDisableGrow which would allow users to access existing data but not allow it to be added to.  Subsequently, all PST file use could be disabled by implementing DisablePST.

In a new Exchange environment, or one where PST files are not used (and the Exchange administrator wants to keep it that way), the DisablePST setting can be applied on its own to stop users being able to add PST files to Outlook.

In any Exchange environment it is probably worth considering implementing a server-side archiving solution before disabling PST files.  Server-side archiving has many benefits compared to PST files, and as many users are determined to keep large quantities of historic e-mail it is better to have a managed solution than unmanaged ad-hoc PST file use a scenario often know as PST hell.

If you are ready to disable PST file use the settings can be applied to Outlook 2007 with Group Policy using the Office 2007 Group Policy Administrative Templates.

Applying PST Group Policy for Outlook 2007

1. Download the Office 2007 ADM Templates and extract the files

http://www.microsoft.com/downloads/details.aspx?FamilyID=92d8519a-e143-4aee-8f7a-e4bbaeba13e7&displaylang=en

2. Launch the Group Policy Management Console, click Start -> Administrative Tools -> Group Policy Management

3. Expand the Forest, Domains, and domain containers then select "Group Policy Objects" 

4. Right-click Group Policy Objects and select New.  Give the new GPO a name, for example PST Policy, and click OK.  (Skip this step if you want to add these settings to an existing GPO.)

5. Right-click PST Policy (or the existing policy you wish to edit)and choose Edit 

6. Expand User Configuration, right-click Administrative Templates and choose Add/Remove Templates

7. Click the Add button and browse to the location of the files extracted in step 2.  Open the ADM folder and the appropriate language subfolder (en-us for English), select the file named outlk12.adm and click Open

8. Click Close to close the Add/Remove Templates dialogue box

9. Expand User Configuration\Administrative Templates\Microsoft Office Outlook 2007\Miscellaneous\PST Settings

10. To implement the DisablePST restriction enable the Prevent users from adding PSTs to Outlook profiles... setting and set the option to Only Sharing-Exclusive PSTs can be added.  This will allow PST files for application such as SharePoint lists, but will prevent user-created PST files from being added.

11. To implement the PSTDisableGrow restriction enable the Prevent users from adding new content to existing PST files. setting. If the PSTDisableGrow setting is implemented users will still be able to create and open PST files, but they will not be able to add any data to any PST files. If they try they will receive this error message:

If the Disable PST setting is implemented the user will see changes in the Outlook user interface.  While any PST files which were already loaded will remain part of the profile, the options to create new PST files or to open any other existing PST files will no longer be in the menu.  Archive options will also be removed.

Disable PST implemented

PST files can be a headache for Exchange administrators, but they dont have to be.  With easily-applied Group Policy settings the use of PST files can be limited, and the problems they cause can be eradicated. 

• Proposed as answer by Vikrant Wakchaure Friday, June 26, 2015 10:54 AM

Outlook PST files are a problem for Exchange users, and give no benefits over Exchange mailboxes. You have to use them on  a local drive, they are difficult to back up, and tricky for the administrator to manage.  It is possible to use Exchange Group Policy settings to limit the use of PST files, and thereby alleviate some of the difficulties they cause. 

Outlook Personal Folder Files (PST files) are a data store that can be used by all versions of Outlook to store e-mail data.  PST files have long been seen as a way to archive mail out of an Exchange mailbox, often to get the mailbox under a quota limit.  However, the use of PST files causes Exchange administrators some serious pain when it comes to managing e-mail.

Briefly, these are some of the problems with PST files:

• Microsoft does not support using PST files over a LAN or WAN network (KB267019). Using PST files located on network shares can slow down Outlook and can cause corruption of the PST file.
• Anti-virus countermeasures cannot be implemented on PST files as easily as Exchange Server mailbox databases.
• It is difficult to accurately report on PST file use, making reporting on organisational mail storage and planning for future growth difficult.
• Managing content of PST files is difficult.  Exchange Server provides tools to manage the content of mailboxes (such as Messaging Records Management) and to export or remove data from mailboxes (such as the Export-Mailbox cmdlet) but there are no such tools to manage the content of PST files.
• Local PST files are difficult to back up, making them vulnerable to data loss.

Fortunately for the Exchange administrator, it is possible to restrict the ability to use PST files.  There are two settings available, and both can be applied using Group Policy registry changes  PSTDisableGrow and DisablePST. PSTDisableGrow prevents new data being added to existing PST files, and DisablePST prevents users creating or opening PST files altogether.

Description	Registry Path	Registry Value
Disable PST files	HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook	DisablePST
Prevent PST file growth	HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook\PST	PstDisableGrow

Table - PST Restriction Registry Values

Note: The registry paths are specific to Outlook versions 12.0 refers to Outlook 2007, the registry path for Outlook 2003 would be ...\Office\11.0\Outlook and so on.

In an environment where PST files already exist, these settings can be applied separately or together to phase out their use.  The first step could be to implement restrictions on the growth of PST files using PSTDisableGrow which would allow users to access existing data but not allow it to be added to.  Subsequently, all PST file use could be disabled by implementing DisablePST.

In a new Exchange environment, or one where PST files are not used (and the Exchange administrator wants to keep it that way), the DisablePST setting can be applied on its own to stop users being able to add PST files to Outlook.

In any Exchange environment it is probably worth considering implementing a server-side archiving solution before disabling PST files.  Server-side archiving has many benefits compared to PST files, and as many users are determined to keep large quantities of historic e-mail it is better to have a managed solution than unmanaged ad-hoc PST file use a scenario often know as PST hell.

If you are ready to disable PST file use the settings can be applied to Outlook 2007 with Group Policy using the Office 2007 Group Policy Administrative Templates.

Applying PST Group Policy for Outlook 2007

1. Download the Office 2007 ADM Templates and extract the files

http://www.microsoft.com/downloads/details.aspx?FamilyID=92d8519a-e143-4aee-8f7a-e4bbaeba13e7&displaylang=en

2. Launch the Group Policy Management Console, click Start -> Administrative Tools -> Group Policy Management

3. Expand the Forest, Domains, and domain containers then select "Group Policy Objects" 

4. Right-click Group Policy Objects and select New.  Give the new GPO a name, for example PST Policy, and click OK.  (Skip this step if you want to add these settings to an existing GPO.)

5. Right-click PST Policy (or the existing policy you wish to edit)and choose Edit 

6. Expand User Configuration, right-click Administrative Templates and choose Add/Remove Templates

7. Click the Add button and browse to the location of the files extracted in step 2.  Open the ADM folder and the appropriate language subfolder (en-us for English), select the file named outlk12.adm and click Open

8. Click Close to close the Add/Remove Templates dialogue box

9. Expand User Configuration\Administrative Templates\Microsoft Office Outlook 2007\Miscellaneous\PST Settings

10. To implement the DisablePST restriction enable the Prevent users from adding PSTs to Outlook profiles... setting and set the option to Only Sharing-Exclusive PSTs can be added.  This will allow PST files for application such as SharePoint lists, but will prevent user-created PST files from being added.

11. To implement the PSTDisableGrow restriction enable the Prevent users from adding new content to existing PST files. setting. If the PSTDisableGrow setting is implemented users will still be able to create and open PST files, but they will not be able to add any data to any PST files. If they try they will receive this error message:

If the Disable PST setting is implemented the user will see changes in the Outlook user interface.  While any PST files which were already loaded will remain part of the profile, the options to create new PST files or to open any other existing PST files will no longer be in the menu.  Archive options will also be removed.

Disable PST implemented

PST files can be a headache for Exchange administrators, but they dont have to be.  With easily-applied Group Policy settings the use of PST files can be limited, and the problems they cause can be eradicated. 

• Proposed as answer by Vikrant Wakchaure Friday, June 26, 2015 11:13 AM

Outlook PST files are a problem for Exchange users, and give no benefits over Exchange mailboxes. You have to use them on  a local drive, they are difficult to back up, and tricky for the administrator to manage.  It is possible to use Exchange Group Policy settings to limit the use of PST files, and thereby alleviate some of the difficulties they cause. 

Outlook Personal Folder Files (PST files) are a data store that can be used by all versions of Outlook to store e-mail data.  PST files have long been seen as a way to archive mail out of an Exchange mailbox, often to get the mailbox under a quota limit.  However, the use of PST files causes Exchange administrators some serious pain when it comes to managing e-mail.

Briefly, these are some of the problems with PST files:

• Microsoft does not support using PST files over a LAN or WAN network (KB267019). Using PST files located on network shares can slow down Outlook and can cause corruption of the PST file.
• Anti-virus countermeasures cannot be implemented on PST files as easily as Exchange Server mailbox databases.
• It is difficult to accurately report on PST file use, making reporting on organisational mail storage and planning for future growth difficult.
• Managing content of PST files is difficult.  Exchange Server provides tools to manage the content of mailboxes (such as Messaging Records Management) and to export or remove data from mailboxes (such as the Export-Mailbox cmdlet) but there are no such tools to manage the content of PST files.
• Local PST files are difficult to back up, making them vulnerable to data loss.

Fortunately for the Exchange administrator, it is possible to restrict the ability to use PST files.  There are two settings available, and both can be applied using Group Policy registry changes  PSTDisableGrow and DisablePST. PSTDisableGrow prevents new data being added to existing PST files, and DisablePST prevents users creating or opening PST files altogether.

Description	Registry Path	Registry Value
Disable PST files	HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook	DisablePST
Prevent PST file growth	HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook\PST	PstDisableGrow

Table - PST Restriction Registry Values

Note: The registry paths are specific to Outlook versions 12.0 refers to Outlook 2007, the registry path for Outlook 2003 would be ...\Office\11.0\Outlook and so on.

In an environment where PST files already exist, these settings can be applied separately or together to phase out their use.  The first step could be to implement restrictions on the growth of PST files using PSTDisableGrow which would allow users to access existing data but not allow it to be added to.  Subsequently, all PST file use could be disabled by implementing DisablePST.

In a new Exchange environment, or one where PST files are not used (and the Exchange administrator wants to keep it that way), the DisablePST setting can be applied on its own to stop users being able to add PST files to Outlook.

In any Exchange environment it is probably worth considering implementing a server-side archiving solution before disabling PST files.  Server-side archiving has many benefits compared to PST files, and as many users are determined to keep large quantities of historic e-mail it is better to have a managed solution than unmanaged ad-hoc PST file use a scenario often know as PST hell.

If you are ready to disable PST file use the settings can be applied to Outlook 2007 with Group Policy using the Office 2007 Group Policy Administrative Templates.

Applying PST Group Policy for Outlook 2007

1. Download the Office 2007 ADM Templates and extract the files

http://www.microsoft.com/downloads/details.aspx?FamilyID=92d8519a-e143-4aee-8f7a-e4bbaeba13e7&displaylang=en

2. Launch the Group Policy Management Console, click Start -> Administrative Tools -> Group Policy Management

3. Expand the Forest, Domains, and domain containers then select "Group Policy Objects" 

4. Right-click Group Policy Objects and select New.  Give the new GPO a name, for example PST Policy, and click OK.  (Skip this step if you want to add these settings to an existing GPO.)

5. Right-click PST Policy (or the existing policy you wish to edit)and choose Edit 

6. Expand User Configuration, right-click Administrative Templates and choose Add/Remove Templates

7. Click the Add button and browse to the location of the files extracted in step 2.  Open the ADM folder and the appropriate language subfolder (en-us for English), select the file named outlk12.adm and click Open

8. Click Close to close the Add/Remove Templates dialogue box

9. Expand User Configuration\Administrative Templates\Microsoft Office Outlook 2007\Miscellaneous\PST Settings

10. To implement the DisablePST restriction enable the Prevent users from adding PSTs to Outlook profiles... setting and set the option to Only Sharing-Exclusive PSTs can be added.  This will allow PST files for application such as SharePoint lists, but will prevent user-created PST files from being added.

11. To implement the PSTDisableGrow restriction enable the Prevent users from adding new content to existing PST files. setting. If the PSTDisableGrow setting is implemented users will still be able to create and open PST files, but they will not be able to add any data to any PST files. If they try they will receive this error message:

If the Disable PST setting is implemented the user will see changes in the Outlook user interface.  While any PST files which were already loaded will remain part of the profile, the options to create new PST files or to open any other existing PST files will no longer be in the menu.  Archive options will also be removed.

Disable PST implemented

PST files can be a headache for Exchange administrators, but they dont have to be.  With easily-applied Group Policy settings the use of PST files can be limited, and the problems they cause can be eradicated. 

• Proposed as answer by Vikrant Wakchaure Friday, June 26, 2015 11:13 AM

Be specific which policy you used to disable pst.

http://www.slipstick.com/exchange/outlook-online-mode-creates-ost-file/

For OST, you can check this link above.

HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\OST
DWORD: NoOST

-Jeff

Hi,

Many thanks everyone for your replies... Jeff, the issue I have is that if I implement what mstoppl suggests this disables the ost.

I need the ost to work, but psts need to be able to connect but not able to be added to

So

ost - full functionality

pst - able to connect, but not able to add to / create

Thanks

James

• Edited by Jamesuk2014 22 hours 26 minutes ago

Hi,

Many thanks everyone for your replies... Jeff, the issue I have is that if I implement what mstoppl suggests this disables the ost.

I need the ost to work, but psts need to be able to connect but not able to be added to

So

ost - full functionality

pst - able to connect, but not able to add to / create

Thanks

James

• Edited by Jamesuk2014 Monday, June 29, 2015 9:03 AM

Hi,

Many thanks everyone for your replies... Jeff, the issue I have is that if I implement what mstoppl suggests this disables the ost.

I need the ost to work, but psts need to be able to connect but not able to be added to

So

ost - full functionality

pst - able to connect, but not able to add to / create

Thanks

James

• Edited by Jamesuk2014 Monday, June 29, 2015 9:03 AM

Hi,

I'm not aware that this will also disable .ost files. Would you please make sure the Outlook client is working in Cached Exchange Mode?

I also need to know the symptom of the issue, do you get any error message about the .ost creation? .ost files are used as local caches of the mailboxes for IMAP, Exchange and Exchange ActiveSync accounts, if .ost is disabled, these types of accounts will all be affected as far as I know.

Regards,

Melon Chen
TechNet Community Su

Hi,

How is this going?

Regards,

Melon Chen
TechNet Community Su