No users are being migrated to the Unified Contact Store (UCS) for Lync 2013 - Exchange 2013

Question

I'm having difficulty getting the unified contact store to work on a migrated Lync/Exchange environment. Both servers have been upgraded to 2013 CU2, and almost everything appears to be working properly...except UCS.
By default the global CsUserServicesPolicy has UcsAllowed set to True. In that mode, none of the Lync users were being migrated to UCS, so I set the global policy to False and created a new Policy called "AllowUCS" and set UcsAllowed to True. I then
assigned that policy to myself and a couple other test accounts. Still, my contacts are not being migrated to the UCS after logging in with Lync 2013.
Other Lync/Exchange integration features are working properly. I have set up OAuth, and it tests successfully, and Lync integration with OWA is working successfully, so I know at least some communication is happening properly between the servers.
Here is what I'm getting when I run some diagnostics from the Lync server:
PS C:\Users\administrator> get-csuser jdoe |FL Name,UserServicesPolicy
Name               : Jon Doe
UserServicesPolicy: AllowUCS
PS C:\Users\administrator> Get-CsUserServicesPolicy |FL
Identity  : Global
UcsAllowed : False
Identity   : Tag:AllowUCS
UcsAllowed : True
PS C:\Users\administrator> Debug-CsUnifiedContactStore -Identity [email protected] |FL
UcsMigrationAttemptCount : 0
LastUcsMigrationAttempt  :
SipUri                   : [email protected]
UcsMode                  : Disabled
PS C:\Users\administrator> Debug-CsUnifiedContactStore -PoolFqdn lync.domain.org
FrontEnd          : lbclync.domain.org
UcsDisabledCount  : 141
UcsAllowedCount   : 0
UcsMigratingCount : 0
UcsMigratedCount  : 0
FailedUserData    :
PS C:\Users\administrator> Test-CsUnifiedContactStore -UserSipAddr
ess [email protected] -TargetFqdn lync.domain.org
Target Fqdn   :lync.domain.org
Result        : Failure
Latency       : 00:00:00.0654970
Error Message : User has not been migrated. Verify that the user has a mailbox
                in Exchange and that the user has been migrated.
Diagnosis     :
Anyone know what I am missing?

Answer 1

Hi,
Please make sure the user has been provisioned with an Exchange 2013 mailbox and has signed into the mailbox at least once.
If the user logs in with a Lync 2010 or earlier client, or if the user is not connected to an Exchange 2013 server, the user services policy is ignored and the user's contacts remain in Lync Server.
Please also check the registry key on the client computer:
HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Lync\<SIP URL>\UCS
If the user's contacts are stored in Exchange 2013, this key contains a value of InUCSMode with a value of 2165.
Kent Huang
TechNet Community Support