12/31/2018 0 Comments Mac Mail Client For ExchangeIn of this article, we discussed symptoms of Mac Mail unable to connect to Exchange 2016 servers through KEMP LoadMaster load balancers. We also discussed troubleshooting steps that addressed the issue of ExRCA.com unable to pass EWS tests, however, we stopped there since Mac Mail failed to connect despite ExRCA EWS tests passed. ![]() Setting Up Exchange On MacLet’s see what we can do to get the Mac Mail to connect successfully to Exchange servers. Since we addressed the 100-continue handling in of this article, ExRCA tests did not indicate any more issues. Microsoft Outlook for Mac did not have issue connecting to Exchange even before we changed 100-continue handling to be RFC-7231 compliant. At this point, I decided to look at the network trace. Looking at the trace captured using Wireshark on the client machine, I noticed the following HTTP dialog: POST /ews/exchange.asmx 401 Unauthorized POST /ews/exchange.asmx 200 OK POST /ews/exchange.asmx 401 Unauthorized POST /ews/exchange.asmx 401 Unauthorized POST /ews/exchange.asmx 400 Bad Request Notice how initial dialog included challenge response for NTLM authentication and ended with 200 OK.
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