Hi,
We are in planning phase to transition of exchange 2007 to 2010. Please help me to understand what does thismean of having externally accessible exchange 2007 CAS server for EWS?
We have Exchange 2007 where OWA, AS, Outlook Anywhere and Autodiscover is published using ISA. Mail.ABC.com which points to External interface of ISA.
We will have Exchange 2010 and will move Mail.ABC.com to Exchange 2010 and Legacy.ABC.com on Exchange 2007.
New rule will be created in ISA for Exchange 2010 for OWA, AS, Outlook Anywhere and Autodiscover. One rule for OWA will be created for legacy.ABC.com and point to Exchange 2007.
Do we need to create publishing rule for EWS servers for exchange 2007 or just OWA rule works ok and CAS 2007 available to client for EWS? Or do we need to create rule for legacy.ABC.com/EWS?
How does EWS woks for Exchange 007 users during mix mode when they access from outside networks using Outlook anywhere or OWA?
From technet..
In any Exchange organization that contains mailboxes on an Exchange 2007 Mailbox server, there must be an externally accessible Exchange 2007 Client Access server. When the Autodiscover service returns the correct Exchange Web Services URL to a requesting client, this URL matches the version of server that the user’s mailbox is on. For any Exchange organization that contains mailboxes on both Exchange 2007 Mailbox servers and Exchange 2010 Mailbox servers, two external URL’s must be configured for Exchange Web Services, one for each installed version of Exchange.