Symptoms
Assume that you configure a primary and backup relationship between two Front End pools in a Microsoft Skype for Business Server 2015 or Lync Server 2013 environment. When there's a difference in case sensitivity between these two pools in the rtcxds.dbo.Document table, a report that's generated by running the Debug-CsInterPoolReplication cmdlet returns the following error:
BATCHES OUT OF SYNC: 1
...
Items out of sync: 2
Item Key: IDNumber - urn:hcd: UserAccount
Message: Source item does not exist on backup pool and it will not be added in a future synchronization (Item Id: " IDNumber ", Document Name: "urn:hcd:UserAccount ")
Item Key: IDNumber - urn:hcd: UserAccount
Message: Backup item does not exist on source pool and it will not be deleted in a future synchronization.
...
Conferences out of sync: 7
Folder: {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX} Error: Folder will not be added (Folder: "\\server.contoso.com\sfb_share\1-WebServices-1\CollabContent\{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}")
However, you can't find any issue in data replication between the primary and backup pools.
Note The same issue occurs for organizer directories in CollabContent and CollabMetadata folders.
Resolution
For Skype for Business Server 2015, install the March 2016 cumulative update 6.0.9319.235, Core Components.
For Lync Server 2013, install the April 2016 cumulative update 5.0.8308.956, Core Components.
