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About half Outlook 2010 clients connecting to Exchange 2010 SP3 RU1 CAS server via HTTPS not TCP/IP


I have 4 Exchange virtual machine (vmwarE) servers SP3 RU1 and use Windows NLB

2 CAS servers

2 DAG servers

CAS Server2 died (because I reverted to a snapshot during an upgrade) so I build a new server did a Setup /m:RecoverServer to recover Exchange and kept the same name and IP.

This issue is when I have both CAS servers up some of my Outlook clients connections are very slow....... When I look in the Outlook clients connection the status says it is connecting via HTTPS not TCP/IP(as it should).

When I look at the Outlook connection status of users who's Outlook works fast the connection status is TCP/IP(as it should be).

When I shut down CAS Server1 and keep CAS Server2 on all my Outlook clients connect via HTTPS and are very slow..........

When I shut down CAS Server2 and keep CAS Server1 on all my Outlook clients connect very fast and connect via TCP/IP

This issue seems to be with CAS Server2 (the recovered Exchange server). I have configure Windows NLB as multicast and set the static ARP records to match the NLB MAC adddress.

I don't know what is missing form CAS Server2? I found this not sure if this is related? I did not apply. See the part "One final step, on each of the NLB members run the following command to allow the NLB virtual IP address to be reachable from outside of the subnet that it resides in."


Any suggestions?

ExchangeWindows Server 2008

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8/22/2022 - Mon


Outlook uses HTTPS to connect to CAS Server when Outlook Anywhere is enabled. Please check if Outlook Anywhere is enabled on CAS Server2 and is not enabled on CAS Server1.

Reference: http://exchangeserverpro.com/how-to-configure-exchange-server-2010-outlook-anywhere/

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found fix on website. CMD in powershell
I started with Experts Exchange in 2004 and it's been a mainstay of my professional computing life since. It helped me launch a career as a programmer / Oracle data analyst
William Peck