Stumbled across what seams to be an odd issue backing up an Exchange DAG. Two servers with four databases, one database per volume. Each server has two active and two passive copies. My intent was to use the agent on both servers and selecting only the volumes that housed the passive copies. However, what I am finding is that Veeam never tells Exchange that the DB was backed up and to truncate the logs. The logs seem to imply that even though Exchange was detected, because I only selected two of four volumes with Exchange data, that it did not enable the Exchange VSS writer and excluded it from the job. I confirmed this by selecting all Exchange data volumes and it worked fine. I would think I should be able to select only certain Exchange DB's for backup right? Is this a bug or some kind of feature by design?