“Skype for Business Server 2015, Backup Service central management backup module has backup data that never gets imported by backup pool.” is logged on primary server referencing the backup server

Problem

You’ve recently failed over the CMS and pool from a primary Skype for Business Server 2015 to a backup server then failed the services back to the primary server but started noticing the following errors logged on the primary active server with the contents referencing the backup server:

Log Name: Lync Server

Source: LS Backup Service

Event ID: 4098

Level: Error

Skype for Business Server 2015, Backup Service central management backup module has backup data that never gets imported by backup pool.

Backup data file: \\drlyncstd01.domain.com\LyncShare\2-BackupService-1\BackupStore\CentralMgmt\CMSMaster\Data\Backup.zip
Cause: Import issue in the backup pool. Please check event log of Skype for Business Server 2015, Backup Service in the backup pool for more information.
Resolution:
Fix import issue in the backup pool

Note that the content in the error log references the backup / disaster recovery server but the event is logged on the primary active server.

The backup / disaster recovery server also has the Skype for Business Server Master Replicator Agent service stopped.  You can start the service but it will stop after a few minutes:

Solution

I’ve noticed this happening in most SfB environments that have experienced a planned or unplanned failover of the CMS and/or pool.  To correct the issue, simply launch the Skype for Business Server 2015 – Deployment Wizard on the backup / disaster recovery server, navigate into the Install or Update Skype for Business Server System menu:

… and then run both the:

• Install Local Configuration Store
• Setup or Remove Skype for Business Server Components

Once the above have successfully completed, the Skype for Business Server Master Replicator Agent service should now start and stay running:

The event ID 4098 error should no longer be logged:

… and an event ID 4099 information log should be written indicating:

Import issue in the backup pool was fixed. Skype for Business Server 2015, Backup Service central management backup module export operation continues now.