Have you looked to see if anything is in the Windows event log?
As checked in event viewer below are the details.
The BMC Atrium Discovery Active Directory Proxy - Active Directory service failed to start due to the following error:
The service did not start due to a logon failure.
The BMC Atrium Discovery Active Directory Proxy - Active Directory service terminated unexpectedly. It has done this 1 time(s).
The AtriumProxy - Active Directory service was unable to log on as domain\service_account with the currently configured password due to the following error:
Logon failure: the user has not been granted the requested logon type at this computer.
Service: AtriumProxy - Active Directory
Domain and account:
This service account does not have the required user right "Log on as a service."
Assign "Log on as a service" to the service account on this computer. You can use Local Security Settings (Secpol.msc) to do this. If this computer is a node in a cluster, check that this user right is assigned to the Cluster service account on all nodes in the cluster.
If you have already assigned this user right to the service account, and the user right appears to be removed, check with your domain administrator to find out if a Group Policy object associated with this node might be removing the right.