This article is part 3 in a series that discusses namespace planning, load balancing principles, client connectivity, and certificate planning.
Over the last several months, we have routinely fie...
Updated Jul 01, 2019
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Hi Ross, I am curious as to the nature of Outlook 2011 clients. I understand that they do not use RPC over HTTPS, but instead use EWS. As we have many MAC clients, we have found that EWS appPools crash and there is a lot of NetLogon issues. In fact, we have had to increase our MaxConcurrentAPI from the default of 10 (for server 2012) to 50. We are now looking to increase to 100 or 150. I am assuming that that outlook 2011 is using NTLM, which is causing the high netlogon issues. We also seem to be finding disconnects and retransmission issues for EWS. We have been on the phone with PSS many times and for long hours over the past two months sending logs and perfmon data back and forth and they cannot determine the cause. In this case, should there be any consideration for session affinity for MAC clients, or are they treated the same as RPC/HTTPS clients? Are there other considerations that we should make, such as BASIC authentication on the EWS sub-directory to reduce the NetLogon issues?