An error message is observed when opening Active Administrator Console, or seen in the logs when maintenance and purging of the database runs:
"Active Administrator Database Maintenance Failed (purging also fails)
Could not load file or assembly 'Microsoft.SqlServer.Smo, Version=220.127.116.11, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The system cannot find the file specified.
Run the 'AA Configuration Wizard' and test the purging/maintenance again.
If SQL 2014 is installed, install the latest cumulative update for SQL Server 2014 SP1.