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Exchange 2007 - Outlook anywhere stopped working

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Exchange 2007 - Outlook anywhere stopped working - 10.Oct.2011 10:27:53 PM   
wingadean

 

Posts: 19
Joined: 9.Oct.2007
Status: offline
Hi there,

Our environment is Windows 2003 x64 on Exchange 2007 SP3 on a CCR cluster with a 2 hub/cas servers.

Over a month ago, outlook anywhere stopped working.
I've followed the Exchange blog and made the changes suggested in:

http://blogs.technet.com/b/exchange/archive/2008/06/20/3405633.aspx

Ive disabled Outlook anywhere, uninstalled RPC/HTTP, rebooted and re-enabled Outlook anywhere again but still not working.

Below is the error message i get on the www.testexchangeconnectivity.com





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

Additional Details

An RPC error was thrown by the RPC Runtime process. Error 1818 1818


I've even added an entry into the host file on our mailbox server and our cas server so the external fqdn points to the internal ip address of our cas server.

When tracing the IIS logs i see these entries in the W3SVC1 folder


2011-10-06 04:49:49 W3SVC1 10.254.72.56 RPC_IN_DATA /rpc/rpcproxy.dll - 443 - 10.254.91.212 MSRPC 401 2 2148074254
2011-10-06 04:49:49 W3SVC1 10.254.72.56 RPC_IN_DATA /rpc/rpcproxy.dll - 443 - 10.254.91.212 MSRPC 401 2 2148074254
2011-10-06 04:49:49 W3SVC1 10.254.72.56 RPC_IN_DATA /Rpc/RpcProxy.dll - 443 - 10.254.91.212 MSRPC 401 2 2148074254
2011-10-06 04:49:50 W3SVC1 10.254.72.56 RPC_IN_DATA /Rpc/RpcProxy.dll - 443 - 10.254.91.212 MSRPC 401 1 0

and these entries in the HTTPERR folder

2011-10-07 02:38:03 10.254.91.212 60214 10.254.72.56 443 HTTP/1.1 RPC_IN_DATA /rpc/rpcproxy.dll?mbxserver.internal.local:6001 400 1 BadRequest DefaultAppPool
2011-10-07 02:38:57 10.254.91.212 60214 10.254.72.56 443 HTTP/1.1 RPC_IN_DATA /rpc/rpcproxy.dll?mbxserver.internal.local:6001 400 1 Connection_Dropped DefaultAppPool

Externally when i go to externalfqdn/rpc/rpcproxy.dll, i dont get prompted for a logon, all i get is Error:Access is Denied. However i do see the correct SSL certificate.

When i try an rpcping from an external client, it is successfull when using the -E option.

but when i trying the rpcping to ports 6001,6002,6004 i get prompted for a password and then get the error message:

Exception 5 (0x000000005)

So it looks like rpc call to the front end server works but then when trying to get to the internal mailbox server it fails.

I have edited the validports registry key and tested from the internal cas server it can telnet to the mailbox server on ports 6001,6002,6004.

Whats different about this environment is that our internal AD domain is named something different to their external domain. Internally we cant get to externalurl.com.au.
Also the reverse proxy is done through a blue coat device and the external certificate is installed on this device but not installed on the internal CAS server. The internal CAS server has a certificate from our local CA authority and in the SAN it does include both the internal and external name. Not sure if this has anything to do with it, but OWA and ActiveSync work im thinking this may not be the issue.

I've been stuck on this problem for a week and looking for some expert advice.

Please help......
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