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Prompted twice for username/password using OWA

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  • Prompted twice for username/password using OWA

    When I log into OWA (through NAT), It prompts me to log in. Once I do that, if my mailbox resides on that server, I am good to go. If my mailbox resides on my other server (I only have two), it prompts me to log into that server as well. At which time, it lets me try but fails.
    Thank you,

    Marc

  • #2
    Re: Prompted twice for username/password using OWA

    So, do we need to guess that you're using a Front-End / Back-End configuration? Oh, that can't be right since you said that some mailboxes reside on one server, the others on the other.

    So, what's your configuration?

    What sort of authentication to you have on the HTTP virtual directories?
    Cheers,

    Daniel Petri
    Microsoft Most Valuable Professional - Active Directory Directory Services
    MCSA/E, MCTS, MCITP, MCT

    Comment


    • #3
      Re: Prompted twice for username/password using OWA

      Sorry, when you are thinking about it for hours, and try to write it down, you tend to leave out the whole picture.

      Two Exchange servers (EX1, EX2), no front end. NAT'ed IP to EX1.

      Internally, even if I type in the IP of the EX1 it automatically prompts me to login to EX2.

      Externally, when typing the IP address of EX1, I get prompted for a username/password. Once that is entered, if the mailbox is on EX2, I get prompted again.
      Thank you,

      Marc

      Comment


      • #4
        Re: Prompted twice for username/password using OWA

        If you aren't using a frontend server then you need to have both servers exposed to the internet.
        Furthermore, the servers will only redirect to the correct server automatically if the server's real name is resolvable on the internet.

        When a client wants to put in a second Exchange server I tell them that they have to budget for a third. When you get past a single Exchange server a frontend server is almost a necessity. It provides you with the single point of entry and gets round the issues with multiple servers exposed to the internet.

        As such I would strongly suggest a frontend server which should provide a better end user experience and more consistent approach.

        Simon.
        --
        Simon Butler
        Exchange MVP

        Blog: http://blog.sembee.co.uk/
        More Exchange Content: http://exchange.sembee.info/
        Exchange Resources List: http://exbpa.com/
        In the UK? Hire me: http://www.sembee.co.uk/

        Sembee is a registered trademark, used here with permission.

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        • #5
          Re: Prompted twice for username/password using OWA

          So, the only way around getting a third server is to NAT to the other server and have a A record pointing to it?
          Thank you,

          Marc

          Comment


          • #6
            Re: Prompted twice for username/password using OWA

            That would still require the user to know which server their mailbox is on.
            You would also need a second SSL certificate (you are using SSL - if not why not - or are you happy for usernames and passwords to go across in the clear?), which would mean a second IP address.

            OWA doesn't like using alternative ports from 80 and 443.

            Simon.
            --
            Simon Butler
            Exchange MVP

            Blog: http://blog.sembee.co.uk/
            More Exchange Content: http://exchange.sembee.info/
            Exchange Resources List: http://exbpa.com/
            In the UK? Hire me: http://www.sembee.co.uk/

            Sembee is a registered trademark, used here with permission.

            Comment


            • #7
              Re: Prompted twice for username/password using OWA

              No one at our company uses the OWA except this one time because the owner is on a cruise and didn't want to carry his laptop. I was just playing and found out that it didn't work. My boss would rather noone use it anyway.

              Speaking of SSL, since I just installed a cert on the main server for TLS, does that work for http as well?
              Thank you,

              Marc

              Comment


              • #8
                Re: Prompted twice for username/password using OWA

                If you have purchased a certificate for TLS then you can use the same certificate for OWA. If it is a home grown certificate then I don't see the point. They generate security warnings which looks unprofessional.

                Simon.
                --
                Simon Butler
                Exchange MVP

                Blog: http://blog.sembee.co.uk/
                More Exchange Content: http://exchange.sembee.info/
                Exchange Resources List: http://exbpa.com/
                In the UK? Hire me: http://www.sembee.co.uk/

                Sembee is a registered trademark, used here with permission.

                Comment


                • #9
                  Re: Prompted twice for username/password using OWA

                  We bought a cert.

                  Thanks again for your help.
                  Thank you,

                  Marc

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