Outlook MAPI connection through Direct Access

i have posted question on exchange forum.

is there special need allow mapi connections through direct access (da)?

when users in building, connected outlook using mapi. when outside , connected through da, outlook using rpc on http

hi techophil,

>> is there special need allow mapi connections through direct access (da)?

you configure firewall allow mapi connections.

please check link below understand outlook , ip-https adapter:

the mystery of ip-https listener, outlook client , ipv4 network

https://blogs.technet.microsoft.com/edgeaccessblog/2010/05/09/the-mystery-of-the-ip-https-listener-an-outlook-client-and-an-ipv4-only-network/

best regards

john

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Windows Server  >  Network Infrastructure Servers