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error sign ing ms communicator 2005 RRS feed

  • Question

  • Hi everybody
    When I try to sing in to microsoft communicator I've got this message:

    "Cannot Sing in to communicator. You may have entered the wrong user,pswd, etc -and this isn't my case- or the authentication service may be incompatible with this version of the program, ...

    I'm using communicator 2005 under windows XP professional edition SP2, and I'm using the corporate network (with proxy)
    I read something in various blog, but i won't be able to make this through...
    I tried with several things:
    I've disabled the windows firewall;
    I've tried to specify the exchange server name, and next the its IP address (in this case the error message changes: it becomes "the server could be temporarily unavailable..."
    I've opened the 5060 port
    I've tried to install a mscommunicator 2005 hotfix
    any result...
    If I've missing something, could you please tell me?
    Thanx in advance
    Bye
    Monday, May 25, 2009 7:39 PM