SQL Plugin Job Fails with Error: "Mandatory arguments not set" or "Starting retention policy task"
Challenge
After the upgrade or installation of the patch for Veeam Backup & Replication 12.3.2.4165, existing Veeam Plug-In for Microsoft SQL jobs fail with the following error:
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Failed to backup database. Error: Mandatory arguments not set Session failed: Mandatory arguments not set.
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Starting retention policy task Session failed
Cause
This issue is caused by an incompatibility between the Veeam Plug-in for Microsoft SQL version 12.3.0.310 (or earlier) and Veeam Backup & Replication 12.3.2.4165.
Solution
To resolve this issue, upgrade Veeam Plug-in for Microsoft SQL Server to version 12.3.2.4165.
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