Exchange 2010, I initially installed our 2 CAS-HUB servers with the UM role as well.
We also are installing our 2 Mailbox Servers to use DAG.
I now understand UM should be installed on the MBX servers.
Any reason it would be on HUB-CAS? Or should I remove the roles? Leave it?
Currently the HUB-CAS servers are live as the Front Ends in our Exchange 2010/2007 coexistence.
MBX servers are ready to be added to the environment.