Set the following registry key on the client machine:
HKEY_Current_user\software\microsoft\tracing\uccp\communicator\enablefiletracing Set this key to 1
After that, exit Office Communicator completely and then go back in and wait for the error to come back. A log file should be generated in the %userprofile%\tracing folder.
For those user who Office communicator history did not work, please check the following option:
1. The "Save my instant message conversations in the Outlook Conversation History folder" option turned on.
2. The Office Communicator is sign-in after the outlook is connected.
3. If the user Domain account is not at the same domain of the exchange server e.g. The user account and exchange server in two different domain, the user AD account’s email address field must need to same at the exchange email account.