Symptoms
Assume that you enable the C2 audit tracing by setting the "C2 Audit mode" option to 1 with sp_configure in Microsoft SQL Server 2012 or SQL Server 2014. After you restart SQL Server for the first time, "C2 Audit mode" option cannot be enabled. However, after you restart SQL Server one more time, the C2 audit tracing works correctly.
Resolution
The issue was first fixed in the following cumulative update of SQL Server.
Cumulative Update 1 for SQL Server 2014 SP1 /en-us/help/3067839
Cumulative Update 8 for SQL Server 2014 /en-us/help/3067836
Cumulative Update 6 for SQL Server 2012 SP2 /en-us/help/3052468
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
