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Issues with CAS array and outlook anywhere

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Issues with CAS array and outlook anywhere - 29.Dec.2013 12:59:11 AM   


Posts: 1
Joined: 13.Apr.2011
Status: offline

I have an issue getting outlook anywhere to work with 2 CAS servers configured as array and with NLB...

My setup is like this:

Server 1: EXCHHTCA1
Server 2: EXCHHTCA2
Array name: casarray.localdomain.com

Outlook anywhere is not working, and after some checking I did around I managed to get it to work on server 1, I had to change the registry on server 1 to be like that:


After I fixed that registry, I checked the remote connectivity analyzer and I was able to connect to the server after I manually specified the internal server 1 name instead of the whole CAS array name...

When I went to server 2 and wanted to check registry, I found some extra keys in the registry that are not existed on server 1 registry...

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Rpc\RpcProxy\RedirectorDLL_EXRDRLBS="C:\\Program Files\\Microsoft\\Exchange Server\\V14\\bin\\exrdrlbs.dll"

When I do a test with remote connectivity analyzer and I specify the CAS array name, I get this error in the results:

Attempting to ping RPC endpoint 6001 (Exchange Information Store) on server The attempt to ping the endpoint failed

I know that there is something wrong here, but I'm a bit confused at this stage, and I would appreciate any tips or help on this matter.
Also before I reach the registry, I already checked the other exchange settings and all seemed OK to me...

< Message edited by SalehRam -- 29.Dec.2013 1:04:08 AM >
Post #: 1
RE: Issues with CAS array and outlook anywhere - 7.Jan.2014 10:59:15 AM   


Posts: 3578
Joined: 21.Jul.2001
From: W Yorks, England
Status: offline
Do not use the cas array name for load balanced OWA or Outlook Anywhere, setup a different FQDN for outlook anywhere and make sure tht you have a valid SSL Certificate on both servers for HTTPS over RPC to work. Do not use self-signed or internal certificates as it needs a trusted certificat to work. You can test connectivity using this web site:



Peter Hutchison MCP
Exchange Administrator
University of Huddersfield

(in reply to SalehRam)
Post #: 2

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