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BugZero found this defect 1078 days ago.
Monthly License Usage Report cannot be collected from Veeam Backup & Replication servers running version 11a.
The license usage data generated by Veeam Backup & Replication 11a is incompatible with Veeam Service Provider Console (VSPC) versions prior to v5 Patch 4.
This issue is resolved in Veeam Service Provider Console v5 Patch 4. However, it is highly recommended to upgrade to Veeam Service Provider Console v6.