In our environment we have 4 stand alone Exchange 2013 CAS servers. Our external smtp mail is routed through our mailbox servers to a email appliance both inbound and outbound. The CAS servers do not handle any email that I am aware of. There are 3 receive
connectors on each of the CAS servers (Client Frontend), (Default Frontend), (Outbound Proxy Frontend). My question is can these be disabled since they are not in the mailflow chain. If not disabled maybe the scope can be restricted. Any assistance welcomed.
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