Hi,
We're in the process of planning a migration to Exchange 2013 from a legacy 2007 system that currently has no external access for security reasons. The new system will allow ActiveSync connections for mobile devices to sync their mailboxes but I'm not sure about the steps required to provide this feature.
I've used the "Exchange Server Deployment Assistant" and can follow the steps to getting the new 2013 servers installed but am not sure if we can allow access to their 2007 mailboxes via ActiveSync from the 2013 CAS servers?
The document seems to suggest that the 2013 CAS will re-direct ActiveSync connections to the 2007 mailbox server but I'm not sure if this happens externally (in which case we'd need to "open up" the legacy servers) or internally which would be the preferred method?
Any ideas?
Cheers for now
Russell