Hello all.
We have Exchange 2013 CU9 infrastructure.
4 Servers in HQ, 1 Server (CAS+Mailbox colocated) in every Branch Office.
All domain users are located in one Active Directory domain.
Email addresses in HQ are @contoso.com, in branches users have addresses like @la.contoso.com, fl.contoso.com.
External DNS records: mail.contoso.com, autodiscover.contoso.com, autodiscover.la.contoso.com, autodiscover.fl.contoso.com.
Direct IP NAT is translated to one CAS Server in HQ.
Outlook Anywhere works fine for users in HQ with addresses like @contoso.com.
But branch office users with branch email addresses can not connect via Outlook Anywhere. If I add @contoso.com SMTP-address to a branch user, everything works. But we should avoid this situation.
External URL on all virtual catalogs in branches is set to $null.
Also we have a problem with autodiscover for activesync branch users.
Does everybody had such problem with multiple SMTP domains? Is it technically possible to implement such Exchange Topology?