files ending with the tmp extension are showing up in the database directories of our 2013 exchange server. These TMP files have zero bytes. They have the current days time stamp while the EDB database file has a date that is several days old. No database goes more than two days without being backed up. We are using Veritas to do full backups at the database level and not incremental backups aka Veeam. If I dismount and remount the database manually the tmp files go away and the edb file gets the current date. Not seeing anything in the application event which might point the way. No end user complaints.