Outlook to Exchange : traffic drops

[Hugo_vd_Kooij]

I have seen various installation where Outlook conencts to Exchange and the customer complains about inactivity issues on the clients. Mostly after the lunch break.

It seems to be related to the use of plain MAPI over MAPI over HTTP. It only seems to be an issue with plain MAPI traffic.

Does anyone have experience with similar issues and did you find a way to curtail the use of random TCP high ports from Exchange back the Outlook client?

[PhoneBoy]

Maybe fix the TCP ports, with something like: https://social.technet.microsoft.com/wiki/contents/articles/864.configure-static-rpc-ports-on-an-exc... 

[Hugo_vd_Kooij]

Yeah, I allready pointed the customer to that one. I would expect that if you use MAPI over HTTP(S) that this would not be an issue anymore. I must admit I hardly see this sort of Exchange issues anymore.