You can selectively enable an "External Webapp URL".... when users access OWA locally, it will use the internal name of the EV server, when users access OWA from the internet, it will use the external URL for search/archive explorer.
Sounds like yo...
What did your EVPM script look like? Maybe you were using the ArchivePermissions section instead of VaultPermissions... you must use VaultPermissions. Check out: http://seer.entsupport.symantec.com/docs/280196.htm
Hmmm Almost seems like an earlier issue on older versions of the OWA 2007 extensions... but you said this was SP4 The issue had to do with Linked Mailboxes If it is definitely SP4 then you could try specifying a Global Catalog for the extensions to u...