Force Lync sync, updating Lync contacts

Lync in combination with sharepoint sometimes doesn't update the profile picture.
To force the update process which by default runs at 1:30 at night, you can run:

Update-CsAddressBook

and/or:

Update-CsUserDatabase

To check the current settings:

Get-CsUserReplicatorConfiguration


Identity                  : Global
ADDomainNamingContextList : {}

ReplicationCycleInterval  : 00:01:00

and:

Get-CsAddressBookConfiguration

Identity                   : Global

RunTimeOfDay               : 1:30

KeepDuration               : 30

SynchronizePollingInterval : 00:05:00

MaxDeltaFileSizePercentage : 20

UseNormalizationRules      : True

IgnoreGenericRules         : False

EnableFileGeneration       : True

Great trouble shooting can be found here:

Source part 1

Source part 2

Source part 3