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OAB not downloading for external clients - 19.Jun.2008 12:46:45 PM

jjm2958

Posts: 10
Joined: 12.Oct.2007
Status: offline

I am at a loss. I have been working on getting this working for a couple weeks now (with Microsoft's help). So far, they haven't been much help.

We have an exchange 2007 SP1 setup with ISA 2006 publishing OWA and outlook Anywhere. Autodiscover seems to be working correctly - I can hit all the relevant URLs from internal and external (even the https://fqdn/OAB/guid/oab.xml from external however when I hit send/receive from Outlook 2007 or "download addresss book" it hangs with "Offline Address Book Connecting to Microsoft Exchange" and it never times out. The only thing I can see in ISA logs that looks like a failure is:

0.0 Microsoft BITS/6.6 Yes Reverse Proxy ISA2006 <outlookanywhere.fqdn.com>TCP Internet - - - Req ID: 06b078ce; Compression: client=No, server=No, compress rate=0% decompress rate=0%, Range=0-4818 - - - 6/19/2008 3:23:03 PM 0 1 2125 428 1359 An internal error occurred. 0x800048 0xd80 Web Proxy Filter 6/19/2008 10:23:03 AM External <external Client IP> <internal IP of CAS> 443 https Failed Connection Attempt Outlook Anywhere anonymous :443/OAB/0d2be744-20bf-44dc-ae7d-7ed61cf272a6/oab.xml">https://<fqdn>:443/OAB/0d2be744-20bf-44dc-ae7d-7ed61cf272a6/oab.xml GET

Does anyone have any ideas of where to continue with this troubleshooting? I've scoured the internet and have tried so many things from splitting out the autodiscover website to a separate web (with its own cert and IP on the CAS) to recreating the OABVirtualdirectory to recreating the OAB itself.

On ISA, the listener whcih has the OAB path is set for HTTP Auth (Basic and Integrated) and FW Rule Auth Delegation is set to "No Delegation, but client may authenticate directly" This was to get around the constant prompting for credentials for cached domain clients using Outlook Anywhere (and NTLM). Not sure what else to include here....

I'm stuck and would appreciate any assistance...

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RE: OAB not downloading for external clients - 23.Jun.2008 9:59:41 AM

jjm2958

Posts: 10
Joined: 12.Oct.2007
Status: offline

Well, for anyone else that might run into this, the solution was to turn off link translation on ISA for the Outlook Anywhere rule (or the rule that had th OAB in the path).

(in reply to jjm2958)

Post #: 2

RE: OAB not downloading for external clients - 24.Jun.2008 9:24:09 AM