Hello,

We have a solution in place that replicates the free/busy data from another
org and assigns it to AD contacts in our org (the solution just writes
free/busy messages in the F/B public folder, using contact's
legacyExchangeDN).

So, here's what we've got:
Outlook 2003 w/mailbox on Exchange 2003 = can view contact's free/busy
Outlook 2003 w/mailbox on Exchange 2007 = can view contact's free/busy
Outlook 2007 w/mailbox on Exchange 2003 = can view contact's free/busy
Outlook 2007 w/mailbox on Exchange 2007 = can NOT view contact's free/busy

Apparently, Outlook 2007 users with mailboxes located on Exchange 2007
cannot view free/busy because in this case Outlook 2007 uses Availability
Service to retrieve free/busy, but that requires a mailbox to exist , which
is not the case for contacts.

So, is there anyway to switch Outlook 2007 to legacy mode of retrieving
free/busy (from public folders) even when it is connected to mailbox located
on Exchange 2007? Or, is there any otherway to resolve this (configure
Availablility service to read free/busy not from mailbox, but from public
folders)?

Thanks!