Not able to login to office communicator


There is an issue we are facing where user is not able to login to office communicator. He'll be getting the error on a web access which says "your session was ended . Communicator web access cannot sign in to the server. (Error code : 0-0-18100-2-0). only this user getting this error while logging in.

Not sure what went wrong. User undergone temp to hire process and got the new ID. Old Id is disabled and all looks good.

We tried to delete the profile for user and recreate but its failing and says "Not enough storage is available to complete this operation. " Any help will be appreciated.

January 16th, 2014 6:38pm


Please try to compare the issued account and other well worked account, you can disable the account and enable it again to test the issue.

It may cause by the issue about certificate, please try the method in the link below about the same error:

Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.

Best Regards,

Eason Huang

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January 17th, 2014 4:50am

Check you set your CWA certificate to be the same as the one IIS is using for the site. then restarted the server and it all started working normally.

you can also check below link for your issue

January 17th, 2014 7:33am

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