On Upgrade (from Office 2010) don't create new .ost file

Hi there, hope someone can help me.

Here is my Problem:

I'm runninng Office 2010 (32Bit Version) on Windows 7 Enterprise x64. I've started Office 2010 with Exchange CacheMode activated. The ost-file is located under D:\Data\outlook\%username%

Now I'm testing Migration to Outlook 2013.

I'm using OAT to do the following things (regarding only Outlook):

- Uninstall of Office 2010

- Install of Office 2013 with using old settings

-Features:  Configuring "Do not create new ost file during Migration" (we have many subsidiaries with low performance connections - so the old ost should be used after migration)

Outlook-Profile: Tried all 3 methods (use existing profile | change profile | new Profile)

At all my tests Outlook creates a new .ost-file under standard directory and don't use  the existing ost-file under D:\Data\%Username%

After These tests i tried it with gpo "donotcreatenewostonupgrade" - But in this case also a new ost is created.

In all cases i have 2 Outlook profiles: "Outlook" (with new ost) and "Backup of Outlook" (with old ost)

-----

By Setting ForceOSTPath to D:\Data\outlook\%username"

and Donotcreatnewostonupgrade to 1

i get two .ost's under D:\Data\outlook\%username" - "outlook.ost" and "Outlook data file.ost"and two mailprofiles "BACKUP OF Outlook" and "Outlook"

So ForceOSTPath is getting used, but Donotcreatnewostonupgrade not *confusing*

Can someone cann tell me a solution for this problem?

Best regards

Daniel

Best regards

Daniel

January 29th, 2015 10:57am

Hi Daniel,

What OAT tool are you using? Is it the Office Customization Tool?

Where did you get the "Do not create new ost file during Migration" option in the tool? As far as I know, OST file cannot be migrated. If you were able to use the old OST file, Outlook will prompt that it doesn't match the server mailbox.

The ForceOSTPath applies only to new profile, it can't be used to force Outlook to use the old OST file.

Regards,

Steve Fan
TechNet Community Support

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January 30th, 2015 12:01pm

Hi Steve,

I'm using the Setup.exe (with /admin for OAT) which comes with the installationsources of Office 2013.

under Features -> Usersettings -> Microsoft Outlook 2013 -> Account Preferences -> Exchange ->you can configure "On Upgrade do not create new OST-File" (translated to English - I have a german Installation)

Or you can configure it via GPO (both variants are creating the same registrykey)

The description says, that if this setting is configured no new ost-file is generated during Migration vom Office 2010 to 2013

https://technet.microsoft.com/en-us/library/cc179067(v=office.15).aspx

Here you can read the same

"If you must keep Outlook 2013 from creating a new compressed Outlook data file (.ost), use the Outlook Group Policy template (Outlk15.admx) to enable the Do not create new OST file on upgrade policy. Find this setting under User Configuration\Administrative Templates\Microsoft Outlook 2013\Account Settings\Exchange."

February 2nd, 2015 3:03am

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