In the details of the backup report an error is displayed that the application will not be available for recovery.
In addition the Application event log on the server will report Event ID 2137.
Log Name: Application
Date: 24/11/2010 12:55:07 PM
Event ID: 2137
Task Category: Service
RPC request to the Microsoft Exchange Information Store service for log truncation failed for database Mailbox Database 02EX1. Error: 4294965485
In the example above the server EX1 was not able to perform log truncation for Mailbox Database 02. Notice that Mailbox Database 02 is currently mounted on a different DAG member, not on EX1. In other words, the database that is mentioned in the event log error is a passive database copy on server EX1 at this time.
[PS] C:\>Get-MailboxDatabaseCopyStatus Name Status ---- ------ Mailbox Database 01EX1 Mounted Mailbox Database 02EX1 Healthy Archive MailboxesEX1 Mounted
This error occurs if an application volume being backed up includes passive database copies. There are two solutions for this issue:
- Only select volumes with active mailbox database copies for inclusion in the backup job. This is not ideal for all environments depending on their database storage layout and whether a mailbox database has been activated on a different server due to a fault or maintenance.
- Add a registry key to disable the Exchange Replica Writer and instead use the Exchange Store Writer for Windows Server Backup
To make this registry change open Regedit and navigate to HKEY_LOCAL_MACHINESOFTWAREMicrosoftExchangeServerV14ReplayParameters. Add a DWORD entry of “EnableVSSWriter” with a value of 0 (zero).
Next, restart the Microsoft Exchange Replication service.
[PS] C:\>Restart-Service MSExchangeRepl
Re-run the backup job and the result should be successful without errors this time.