I noticed the following in the sql server log, is there any way to determine the login/user that initiated this change. It appears a database was set to single user mode and back to multi user. Here is the log snippet
Date 10/10/2017 8:55:27 PM
Log SQL Server (Current - 10/11/2017 8:00:00 AM)
Message Setting database option MULTI_USER to ON for database 'DBNAME'