Error: Failed to expand object added to the job 503 ...
https://www.veeam.com/kb113602.08.2011 · Cause. The vCenter database is on the SQL Server Express Edition, which has a 4 GB of data limitation. If the vCenter database is full, every new transaction is written to cache. As a result when the cache is full, the database service will just stop. The cache gets cleared after a reboot of the vCenter Server, so vCenter starts to work until ...