Active Manager? – Never heard, right?


If you are using Exchange 2013 with a DAG setup you are familiar with the PAM or Primary Active Manager, right? And you are more familiar with SAM – the Secondary Active Manager – aren’t you?

The Active Manager runs within MSExchangeRepl.exe and manages the database copy between the Nodes within the DAG. PAM is the instance which decides which copy of a DAG should be Active.

Be aware: Exchange itself is not a clustered application. It just uses the Windows Failover-Cluster technology to do the job.

Important while do a planned upgrade from Exchange to a new Cumulative Update: Note: If your DAG have more nodes, you need first upgrade all non PAM nodes and then upgrade PAM node.

Details about PAM/SAM and more can be found here: Active Manager

Your EXGuru – aka Peter Forster – aka Satschent Peter

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