Microsoft SCCM has a Health Agent Task scheduled to run over night. The task does not support WMI 3.0. WMI 3.0 is incorporated in Veeam Backup & Replication as a dependency. When the Health Agent clears the WMI repository, it kills Veeam services in the process. You might see other WMI errors in the event logs, or a message about an SMS Agent starting shortly before.