Hi,

Lync Client uses MAPI connection to save the chat session in the history folder and show you the presence of the users within Outlook.

check if MAPI connection is ok by holding CTRL and right click on the Lync icon in the system tray and select "Configuration Information"

also make sure you didn't do any changes to the Conversations history folder in outlook

you might want to check this article: http://social.technet.microsoft.com/Forums/lync/en-US/d274b731-271b-4933-9bde-2f5ca49ba416/lync-2010-conversation-history-not-save-in-outlook-2010?forum=ocspresence

Exchange Server 2007 SP1 and above must be deployed in conjunction with Lync Server 2013 in order to enable IM messages to be stored in the Exchange store. Specifically:

Lync 2013 Compatibility
http://technet.microsoft.com/en-us/library/gg412817.aspx

The following features are available only through EWS (not MAPI*):

- Read or delete items in the Conversation History folder
- Read or delete voice mail items
- Display extended free/busy information and meeting subject and location

Hence, ensure that Exchange Web Services, EWS is properly configured and working correctly in your environment.

Please share with us if this helps. Thanks.

* Lync 2010 Integration
http://technet.microsoft.com/en-us/library/gg398806(v=ocs.14).aspx

• Edited by Desmond LeeMVP, Moderator Thursday, April 17, 2014 2:19 PM

Exchange Server 2007 SP1 and above must be deployed in conjunction with Lync Server 2013 in order to enable IM messages to be stored in the Exchange store. Specifically:

Lync 2013 Compatibility
http://technet.microsoft.com/en-us/library/gg412817.aspx

The following features are available only through EWS (not MAPI*):

- Read or delete items in the Conversation History folder
- Read or delete voice mail items
- Display extended free/busy information and meeting subject and location

Hence, ensure that Exchange Web Services, EWS is properly configured and working correctly in your environment.

Please share with us if this helps. Thanks.

* Lync 2010 Integration
http://technet.microsoft.com/en-us/library/gg398806(v=ocs.14).aspx

• Edited by Desmond LeeMVP, Moderator Thursday, April 17, 2014 2:19 PM

Exchange Server 2007 SP1 and above must be deployed in conjunction with Lync Server 2013 in order to enable IM messages to be stored in the Exchange store. Specifically:

Lync 2013 Compatibility
http://technet.microsoft.com/en-us/library/gg412817.aspx

The following features are available only through EWS (not MAPI*):

- Read or delete items in the Conversation History folder
- Read or delete voice mail items
- Display extended free/busy information and meeting subject and location

Hence, ensure that Exchange Web Services, EWS is properly configured and working correctly in your environment.

Please share with us if this helps. Thanks.

* Lync 2010 Integration
http://technet.microsoft.com/en-us/library/gg398806(v=ocs.14).aspx

• Edited by Desmond LeeMVP, Moderator Thursday, April 17, 2014 2:19 PM

The Conversation History is saved using the MAPI Connection between Lync Client and Outlook Client.

Please check the Lync Configuration Information. The MAPI Status and EWS Status should be OK.

Also you can refer below link

http://exchangeserverinfo.net/2013/02/lync-unable-to-save-conversation-history-in-outlook/

Exchange Server 2007 SP1 and above must be deployed in conjunction with Lync Server 2013 in order to enable IM messages to be stored in the Exchange store. Specifically:

Lync 2013 Compatibility
http://technet.microsoft.com/en-us/library/gg412817.aspx

The following features are available only through EWS (not MAPI*):

- Read or delete items in the Conversation History folder
- Read or delete voice mail items
- Display extended free/busy information and meeting subject and location

Hence, ensure that Exchange Web Services, EWS is properly configured and working correctly in your environment.

Please share with us if this helps. Thanks.

* Lync 2010 Integration
http://technet.microsoft.com/en-us/library/gg398806(v=ocs.14).aspx

• Edited by Desmond LeeMVP, Moderator Thursday, April 17, 2014 2:19 PM

Please check that you didnt run out of your mailbox.

Check if other user can save conversation history on your computer.

Check if your account can save conversation history on computer worked for other accounts.

how is this marked as an answer? 

for some reason you Community support people jump the gun way to fast & mark your answers as correct without verification from the OP

please unmark as this is not an answer & is only steps...i know it doesnt work since i have a similar issue, 

& opened a new thread

• Proposed as answer by justsignedupforthiscomment Wednesday, December 31, 2014 7:00 PM
• Unproposed as answer by justsignedupforthiscomment Wednesday, December 31, 2014 7:00 PM

how is this marked as an answer? 

for some reason you Community support people jump the gun way to fast & mark your answers as correct without verification from the OP

please unmark as this is not an answer & is only steps...i know it doesnt work since i have a similar issue, 

& opened a new thread

• Proposed as answer by justsignedupforthiscomment Wednesday, December 31, 2014 7:00 PM
• Unproposed as answer by justsignedupforthiscomment Wednesday, December 31, 2014 7:00 PM

how is this marked as an answer? 

for some reason you Community support people jump the gun way to fast & mark your answers as correct without verification from the OP

please unmark as this is not an answer & is only steps...i know it doesnt work since i have a similar issue, 

& opened a new thread

• Proposed as answer by justsignedupforthiscomment Wednesday, December 31, 2014 7:00 PM
• Unproposed as answer by justsignedupforthiscomment Wednesday, December 31, 2014 7:00 PM

how is this marked as an answer? 

for some reason you Community support people jump the gun way to fast & mark your answers as correct without verification from the OP

please unmark as this is not an answer & is only steps...i know it doesnt work since i have a similar issue, 

& opened a new thread

• Proposed as answer by justsignedupforthiscomment Wednesday, December 31, 2014 7:00 PM
• Unproposed as answer by justsignedupforthiscomment Wednesday, December 31, 2014 7:00 PM

how is this marked as an answer? 

for some reason you Community support people jump the gun way to fast & mark your answers as correct without verification from the OP

please unmark as this is not an answer & is only steps...i know it doesnt work since i have a similar issue, 

& opened a new thread

So i figured this out.

the History spooler folder in the appdata folder is where the convos are stored prior to being sent to exchange.

my issue was that anytime a file in there was over 1mb, it stoppeed processing them.

after removing the 1mb file(s) the convo history started working again

though I did need to log the user in & out a bunch of times, as logging into lync only processed 10 files at a time.

• Proposed as answer by Steve_Lindsey Wednesday, August 06, 2014 7:50 PM

how is this marked as an answer? 

for some reason you Community support people jump the gun way to fast & mark your answers as correct without verification from the OP

please unmark as this is not an answer & is only steps...i know it doesnt work since i have a similar issue, 

& opened a new thread

So i figured this out.

the History spooler folder in the appdata folder is where the convos are stored prior to being sent to exchange.

my issue was that anytime a file in there was over 1mb, it stoppeed processing them.

after removing the 1mb file(s) the convo history started working again

though I did need to log the user in & out a bunch of times, as logging into lync only processed 10 files at a time.

• Proposed as answer by Steve_Lindsey Wednesday, August 06, 2014 7:50 PM

how is this marked as an answer? 

for some reason you Community support people jump the gun way to fast & mark your answers as correct without verification from the OP

please unmark as this is not an answer & is only steps...i know it doesnt work since i have a similar issue, 

& opened a new thread

So i figured this out.

the History spooler folder in the appdata folder is where the convos are stored prior to being sent to exchange.

my issue was that anytime a file in there was over 1mb, it stoppeed processing them.

after removing the 1mb file(s) the convo history started working again

though I did need to log the user in & out a bunch of times, as logging into lync only processed 10 files at a time.

• Proposed as answer by Steve_Lindsey Wednesday, August 06, 2014 7:50 PM

how is this marked as an answer? 

for some reason you Community support people jump the gun way to fast & mark your answers as correct without verification from the OP

please unmark as this is not an answer & is only steps...i know it doesnt work since i have a similar issue, 

& opened a new thread

So i figured this out.

the History spooler folder in the appdata folder is where the convos are stored prior to being sent to exchange.

my issue was that anytime a file in there was over 1mb, it stoppeed processing them.

after removing the 1mb file(s) the convo history started working again

though I did need to log the user in & out a bunch of times, as logging into lync only processed 10 files at a time.

• Proposed as answer by Steve_Lindsey Wednesday, August 06, 2014 7:50 PM

I'm faced this problem while Monday Aug 4 recently.

Workaround 100% working as below step.

- Rejoin domain.

- After restarted, Remove old Lync Certificate in mmc.  In management console Add-snap in Certificate > choose current users > Personal > Remove items Issued by Communications Server.

- Ms Office key under HKUsers > <<UID>> > Software > Microsoft, delete Office key. ( make sure no Ms Office program is running )

- Clear Lync cache. \%AppData%\..\Local\Microsoft\Office\15.0\Lync\, remove SIP Address.

- Run gpupdate /force in command prompt.

- Start Ms Office Outlook then only start Lync 2013

I'm faced this problem while Monday Aug 4 recently.

Workaround 100% working as below step.

- Rejoin domain.

- After restarted, Remove old Lync Certificate in mmc.  In management console Add-snap in Certificate > choose current users > Personal > Remove items Issued by Communications Server.

- Ms Office key under HKUsers > <<UID>> > Software > Microsoft, delete Office key. ( make sure no Ms Office program is running )

- Clear Lync cache. \%AppData%\..\Local\Microsoft\Office\15.0\Lync\, remove SIP Address.

- Run gpupdate /force in command prompt.

- Start Ms Office Outlook then only start Lync 2013

you should try my solution above. its alot less work & works 99.99% of the time.

the reason yours worked is because you deleted the sip folder (which is where the history spooler folder is) so essentially you deleted any convo files over 1mb. 

• Proposed as answer by justsignedupforthiscomment Friday, December 19, 2014 7:12 PM

I'm faced this problem while Monday Aug 4 recently.

Workaround 100% working as below step.

- Rejoin domain.

- After restarted, Remove old Lync Certificate in mmc.  In management console Add-snap in Certificate > choose current users > Personal > Remove items Issued by Communications Server.

- Ms Office key under HKUsers > <<UID>> > Software > Microsoft, delete Office key. ( make sure no Ms Office program is running )

- Clear Lync cache. \%AppData%\..\Local\Microsoft\Office\15.0\Lync\, remove SIP Address.

- Run gpupdate /force in command prompt.

- Start Ms Office Outlook then only start Lync 2013

you should try my solution above. its alot less work & works 99.99% of the time.

the reason yours worked is because you deleted the sip folder (which is where the history spooler folder is) so essentially you deleted any convo files over 1mb. 

• Proposed as answer by justsignedupforthiscomment Friday, December 19, 2014 7:12 PM

I'm faced this problem while Monday Aug 4 recently.

Workaround 100% working as below step.

- Rejoin domain.

- After restarted, Remove old Lync Certificate in mmc.  In management console Add-snap in Certificate > choose current users > Personal > Remove items Issued by Communications Server.

- Ms Office key under HKUsers > <<UID>> > Software > Microsoft, delete Office key. ( make sure no Ms Office program is running )

- Clear Lync cache. \%AppData%\..\Local\Microsoft\Office\15.0\Lync\, remove SIP Address.

- Run gpupdate /force in command prompt.

- Start Ms Office Outlook then only start Lync 2013

you should try my solution above. its alot less work & works 99.99% of the time.

the reason yours worked is because you deleted the sip folder (which is where the history spooler folder is) so essentially you deleted any convo files over 1mb. 

• Proposed as answer by justsignedupforthiscomment Friday, December 19, 2014 7:12 PM

I'm faced this problem while Monday Aug 4 recently.

Workaround 100% working as below step.

- Rejoin domain.

- After restarted, Remove old Lync Certificate in mmc.  In management console Add-snap in Certificate > choose current users > Personal > Remove items Issued by Communications Server.

- Ms Office key under HKUsers > <<UID>> > Software > Microsoft, delete Office key. ( make sure no Ms Office program is running )

- Clear Lync cache. \%AppData%\..\Local\Microsoft\Office\15.0\Lync\, remove SIP Address.

- Run gpupdate /force in command prompt.

- Start Ms Office Outlook then only start Lync 2013

you should try my solution above. its alot less work & works 99.99% of the time.

the reason yours worked is because you deleted the sip folder (which is where the history spooler folder is) so essentially you deleted any convo files over 1mb. 

• Proposed as answer by justsignedupforthiscomment Friday, December 19, 2014 7:12 PM

This fixed my issue completely.  I signed up just to tell everyone this.

\AppData\Local\Microsoft\Office\15.0\Lync\sip_XXXXXXXXXXXXXXX\History Spooler

I went into that folder and deleted everything that I saw (it had about 400 history files).  Once I did that, logging began operating normally.

 1mb. 

So as an update.....

I ran into a similar issue the other day, & the solution listed above did not work. What the issue turned out to be was the user had over 1000 folders in Outlook. 

We had to make a custom throttle policy for the user which had the EWSFindCountLimit increased (we used 2000) & then once we set his mailbox to use that policy the conversation history began working again

• Edited by Steve_Lindsey 14 hours 31 minutes ago
• Proposed as answer by Steve_Lindsey 14 hours 31 minutes ago

 1mb. 

So as an update.....

I ran into a similar issue the other day, & the solution listed above did not work. What the issue turned out to be was the user had over 1000 folders in Outlook. 

We had to make a custom throttle policy for the user which had the EWSFindCountLimit increased (we used 2000) & then once we set his mailbox to use that policy the conversation history began working again

• Edited by Steve_Lindsey Thursday, February 26, 2015 9:19 PM
• Proposed as answer by Steve_Lindsey Thursday, February 26, 2015 9:19 PM

 1mb. 

So as an update.....

I ran into a similar issue the other day, & the solution listed above did not work. What the issue turned out to be was the user had over 1000 folders in Outlook. 

We had to make a custom throttle policy for the user which had the EWSFindCountLimit increased (we used 2000) & then once we set his mailbox to use that policy the conversation history began working again

• Edited by Steve_Lindsey Thursday, February 26, 2015 9:19 PM
• Proposed as answer by Steve_Lindsey Thursday, February 26, 2015 9:19 PM

 1mb. 

So as an update.....

I ran into a similar issue the other day, & the solution listed above did not work. What the issue turned out to be was the user had over 1000 folders in Outlook. 

We had to make a custom throttle policy for the user which had the EWSFindCountLimit increased (we used 2000) & then once we set his mailbox to use that policy the conversation history began working again

• Edited by Steve_Lindsey Thursday, February 26, 2015 9:19 PM
• Proposed as answer by Steve_Lindsey Thursday, February 26, 2015 9:19 PM

 1mb. 

So as an update.....

I ran into a similar issue the other day, & the solution listed above did not work. What the issue turned out to be was the user had over 1000 folders in Outlook. 

We had to make a custom throttle policy for the user which had the EWSFindCountLimit increased (we used 2000) & then once we set his mailbox to use that policy the conversation history began working again

• Edited by Steve_Lindsey Thursday, February 26, 2015 9:19 PM
• Proposed as answer by Steve_Lindsey Thursday, February 26, 2015 9:19 PM

since I had some important conversations in mine here is how I saved them.

renamed \AppData\Local\Microsoft\Office\15.0\Lync\sip_XXXXXXXXXXXXXXX\History Spooler to .OLD

restarted Lync and \AppData\Local\Microsoft\Office\15.0\Lync\sip_XXXXXXXXXXXXXXX\History Spooler was recreated

copied and pasted the .hist files and they started heading to outlook 10 at a time each time I closed a conversation window - only 182 more to go :)

hope this helps

since I had some important conversations in mine here is how I saved them.

renamed \AppData\Local\Microsoft\Office\15.0\Lync\sip_XXXXXXXXXXXXXXX\History Spooler to .OLD

restarted Lync and \AppData\Local\Microsoft\Office\15.0\Lync\sip_XXXXXXXXXXXXXXX\History Spooler was recreated

copied and pasted the .hist files and they started heading to outlook 10 at a time each time I closed a conversation window - only 182 more to go :)

hope this helps

• Proposed as answer by Aleksi älli Tuesday, March 17, 2015 9:16 AM

since I had some important conversations in mine here is how I saved them.

renamed \AppData\Local\Microsoft\Office\15.0\Lync\sip_XXXXXXXXXXXXXXX\History Spooler to .OLD

restarted Lync and \AppData\Local\Microsoft\Office\15.0\Lync\sip_XXXXXXXXXXXXXXX\History Spooler was recreated

copied and pasted the .hist files and they started heading to outlook 10 at a time each time I closed a conversation window - only 182 more to go :)

hope this helps

• Proposed as answer by Aleksi älli Tuesday, March 17, 2015 9:16 AM

since I had some important conversations in mine here is how I saved them.

renamed \AppData\Local\Microsoft\Office\15.0\Lync\sip_XXXXXXXXXXXXXXX\History Spooler to .OLD

restarted Lync and \AppData\Local\Microsoft\Office\15.0\Lync\sip_XXXXXXXXXXXXXXX\History Spooler was recreated

copied and pasted the .hist files and they started heading to outlook 10 at a time each time I closed a conversation window - only 182 more to go :)

hope this helps

• Proposed as answer by Aleksi älli Tuesday, March 17, 2015 9:16 AM

since I had some important conversations in mine here is how I saved them.

renamed \AppData\Local\Microsoft\Office\15.0\Lync\sip_XXXXXXXXXXXXXXX\History Spooler to .OLD

restarted Lync and \AppData\Local\Microsoft\Office\15.0\Lync\sip_XXXXXXXXXXXXXXX\History Spooler was recreated

copied and pasted the .hist files and they started heading to outlook 10 at a time each time I closed a conversation window - only 182 more to go :)

hope this helps

• Proposed as answer by Aleksi älli Tuesday, March 17, 2015 9:16 AM

Please change the registry settings on the PC

HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Lync]
"TrustModelData"="%domainname%"

Domain name should be your primary smtp domain address

for eg mohideen@contoso.com

domain name should be contoso.com

• Proposed as answer by Noor Mohideen 19 hours 39 minutes ago

Please change the registry settings on the PC

HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Lync]
"TrustModelData"="%domainname%"

Domain name should be your primary smtp domain address

for eg mohideen@contoso.com

domain name should be contoso.com

• Proposed as answer by Noor Mohideen Thursday, June 11, 2015 11:46 AM

Please change the registry settings on the PC

HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Lync]
"TrustModelData"="%domainname%"

Domain name should be your primary smtp domain address

for eg mohideen@contoso.com

domain name should be contoso.com

• Proposed as answer by Noor Mohideen Thursday, June 11, 2015 11:46 AM

Please change the registry settings on the PC

HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Lync]
"TrustModelData"="%domainname%"

Domain name should be your primary smtp domain address

for eg mohideen@contoso.com

domain name should be contoso.com

• Proposed as answer by Noor Mohideen Thursday, June 11, 2015 11:46 AM

Below resolution worked for me 

OS Win7 Enterprise

Make sure to close Outlook and Lync completely , even lync.exe from task manager

Try going under

C:\Users\username\AppData\Local\Microsoft\Office\15.0\Lync

Delete what is in here also

C:\Users\username\AppData\Roaming\Microsoft\Office\15.0\Lync

And same delete here

Then reboot

• Edited by rbk84 18 hours 28 minutes ago add info

Below resolution worked for me 

OS Win7 Enterprise

Make sure to close Outlook and Lync completely , even lync.exe from task manager

Try going under

C:\Users\username\AppData\Local\Microsoft\Office\15.0\Lync

Delete what is in here also

C:\Users\username\AppData\Roaming\Microsoft\Office\15.0\Lync

And same delete here

Then reboot

• Edited by rbk84 Thursday, June 25, 2015 12:57 PM add info