I have one 03 Exchange server and 3 07 Exchange servers. Two are SCC and 1 CAS/HT. Currently all but 3 mailboxes are stored on 03 Exchange. The users access owa at https://webmail.domain.com Activsync uses the same address. The users on 07 currently use the server name to access via OWA and ActiveSync e.x. https://servera.domain.com
What I want is for all users to go to the same url for OWA and ActiveSync and Exchange auto detects where their mailboxes are and serves up correctly. If I can make it to where the requests are served through the 07 CAS for everyone, this will make the migration alot easier. How do I go about configuring everything to accomplish this?
have your webmail.domain.com point to the IP address of the CAS server. Tell everyone to log on using http://webmail.domain.com/exchange
If the users mailbox is on E2K3, it will redirect to the e2k3 backend server while if the mailbox is on e2k7, it will be redirected to the mailbox role.
also, regardless if use an account with an 03 mailbox or 07 I get this when going to /exchange on the CAS:
401 - Unauthorized: Access is denied due to invalid credentials. You do not have permission to view this directory or page using the credentials that you supplied.
I would recommend not to jump to the end from the beginning. Get it working how it is supposed to work first, then start your customization. Once you get webmail.domain.com/exchange working as expected, then we can deal with removing the requirement for /exchange (which is easy anyways).
What authentication methods do you on the Exchange and OWA virtual directories when you look at them from the Exchange management console?
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Ibrahim Benna - Microsoft Exchange MVP Forum Moderator Navantis
Do you get prompted for credentials when logging on as an exchange 2003 user? Do you get the same results when logging on as an Exchange 2007 users? Do you have forms based authentication enabled on the E2K3 server?
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Ibrahim Benna - Microsoft Exchange MVP Forum Moderator Navantis
Where on the 03 server would I look for the authentication methods? I see on the default web site and that the it is set to basic authentication. I dont see an area for forms based.
Open the exchange system manager. Drill through the administrative groups to the E2K3 server\protocols\HTTP and open the properties of the "virtual server". There you will find the authentication method\tab (sorry if i am mistaken but im working off memory here; havent worked with E2K3 for some time now)
Change the authentication method in the Exchange Management Console for the CAS server's EXCHANGE, EXCHWEB and PUBLIC virtual directory to use integrated only. Leave OWA virtual directory as it currently is! Once done, run IISRESET to restart IIS services and test the new settings (same 3 tests please).
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Ibrahim Benna - Microsoft Exchange MVP Forum Moderator Navantis
Integrated only causes all three to be page cant be displayed. Turning basic back on works https://casserver.domain.com/exchange works for 03 and 07 user accounts.
The migration would be alot easier if I could just point public DNS A records to the new CAS server and users would still continue using https://webmail.domain.com like they do today.
Actually after you remove exchange 2003, the "exchange" virtual directory will still exist but there's no need to use it. It is mainly used for backward proxy from a CAS server to an exchange 2003 server. So decommissioning the E2K3 server, your users will need to go to /OWA instead.
Now for the /Exchange redirection so your users just type https://CasServer.domain.com. There are many different ways to do this but I usually use a HTM file to perform the redirection. Check my post in the link below
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