CAS coexistence and migration
From a coexistence perspective, it is critical to update your Exchange organization so that all incoming CAS traffic flows first to an Exchange 2013 CAS. This is probably the biggest required change you’ll face from a CAS perspective, although if you are using load balancing and want to take advantage of the end of the requirement for affinity, those changes will run a close second.
Routing inbound traffic to the 2013 CAS role
Making this change is mostly a matter of configuring systems other than Exchange. In most environments, you’ll have to do some or all of the following to get traffic flowing to the right place:
Evaluate your Active Directory site topology to decide whether there are any aspects of it you want to ...
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