IMAP - UIDPLUS extension Not Reported by Capability Command - Exchange 2010, Exchange 2013

Our sales team is trying to use a SAAS based sales tool that requires IMAP with UIDPLUS extension support. After some initial issues with the setup, we were advised by the sales tool support staff that our current Exchange 2007 environment was not supported and that we need to be running Exchange 2010 SP 1 or later.

To resolve the issue, I proceeded to install a new Exchange 2013 server using the Exchange 2013 SP1 media.  After getting an Exchange 2013 box added to our 2007 environment, I moved the necessary mailbox to the new server and tested access.  The sales tool continued to report that our IMAP server was not supported.

Doing some manual testing via telnet, I was able to confirm that our new Exchange 2013 server was not sending the UIDPLUS indicator when the CAPABILITY command was issued.   Not having installed any rollups after doing the base install, I assumed this was the issue.  However, even after installing the latest rollup, UIDPLUS was still not being reported in the CAPABILITY output.  

Some research showed that the UIDPLUS extension was supported in Exchange 2003, left out in Exchange 2007 and then added in Echange 2010 some time after RTM. Seeing that this functionality was re-introduced in Exchange 2010,  I decided to uninstall Exchange 2013 and drop down to Exchange 2010. Installed Exchange 2010 with the Exchange 2010 SP3 media (SP3 required since Exchange 2013 had been introduced to the organization);  but still no UIDPLUS indicator in the CAPABILITY command output.  Updated to the latest rollup, still no good.

Documentation on this is pretty sparse and have been unable to locate any relevant forum/kb/blog posts. Any assistance would be appreciated. 

 


  • Edited by IT_DANAZ 7 hours 49 minutes ago clarification
August 11th, 2015 4:50am

Ask the vendor since they should certainly know whether they are compatible with Exchange and can tell you which versions, service packs and update rollups are supported.

Or, choose a different sales tool that is compatible with what you're running.

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August 12th, 2015 1:01am

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