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One of many OAB download problems :)

There are many great articles about what could go wrong when accessing Offline Address Book but I would like to expose one related to the ISA 2006 server.

Disable Link translation on ISA 2006 Outlook Anywhere rule if you tried anything else before and you are, of course, using ISA 2006. You get "Failed Connection Attempt ISALog type: Web Proxy (Reverse) Status: 1359 An internal error occurred." error on ISA box.



Otherwise, for OAB related problems:
- check if Authenticated users group has read permissions on OAB folder on Exchange CAS server
- check IIS permissions http://technet.microsoft.com/en-us/library/gg247612.aspx
- check if Autodiscover is functioning
- be aware of multi-tenant autodiscover if you are using multiple domains http://social.technet.microsoft.com/wiki/contents/articles/5787.exchange-2010-multi-tenant-autodiscover-and-dns-configuration.aspx
- for other OAB related problems find Dave Goldman's related articles or Dgoldman's WebLog

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