http/1.1 503 service unavailable

Posted on 2005-04-19
Last Modified: 2008-01-09
We recently brought up a new exchange 2003 server with sp1 on windows 2003 server within the same admin group.
We moved some users from another exchange 2003 to the new one.

now users are not able to logon to the OWA 2003 They get the following error

http/1.1 503 service unavailable

any help will be appreciated
Question by:cdaya
    LVL 13

    Expert Comment

    Sounds like OWA is not setup right on the other machine.

    1) Setup SSL.  I have noticed many problems with permissions until I setup SSL, then they seem to go away.

    2) Use a Frontend server for OWA (can not view mail on this server)


    Author Comment

    The issue with users not being able to access OWA are on a new backend server that i installed. I have 3 other backend mailbox servers on which the users are fine accessing their mailbox via OWA.
    So it cannot be authenication issue or SSL issue.
    Do I need to do anything on the new backend server.
    LVL 24

    Expert Comment

    by:David Wilhoit
    Is the backend server in a different domain? Have you checked to see that the RUS is working? Have you verified that you can connect to OWA directly on the backend server itself?


    Author Comment

    the backend is on same domain. RUS is working
    when i do newserver\exchange it goes to one of my existing servers
    LVL 24

    Accepted Solution

    then something else is wrong. OWA is installed on every E2Kx server, so unless IIS isn't running, then the OWA server has to answer. http//:servername/exchange, regardless of whether or not the mailbox is available, should get you to the authentication box or the FBA screen on that server. Can you open OWA from the server itself?

    Author Comment

    I found the issue. Everything is fine with the FE and BE servers
    our network group forgot to allow add to ACL list for this new site. Once all routes were added on cisco switch everything went fine.
    Thanks for all the help

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