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OCS Federation problem RRS feed

  • Question

  • HI ,Gurus. i am having problem to add federation partner contacts.  Right now, our company external and internal user can communicate well with OCS edge sever except with federation partner.

    Here is what i have done:
    I enabled the user for federation.
    I enabled the edge server on "Federate with other domains" and even add the domain into the "Allow" list.  
    I added the _sipfederationtls._tcp.sipdomain.com  5061 to the external DNS srv.

    Now when i checked the federation contact status it shows" cannot get presence for this contact because the domain cannot be reached"
    when i run the validation task on edge server it shows" attempting to establish sip dialogue with federateduser using xxx.domain.com"
    xxx is our frond end server, is that right? 
    I heard that for federation we need a public certification, is that necessary?

    Is there any other step i need to take?

    Thanks!
    nin
    Thursday, September 3, 2009 7:41 PM

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