Lync 2013 Certificate requierment

Posted on 2014-07-11
Last Modified: 2014-08-14
I need to deploy lync 2013 in my domain ( Due to compliance limitation i cant build an internal CA server now. I am planing to buy certificate for my front end server from external vendor. However, as i don't own the public domain name ( vendors are not issuing me even internal certificate. can i change the FQDN of my lync from to (one i own)?
Question by:biplabmukh
    LVL 77

    Expert Comment

    by:David Johnson, CD, MVP
    you will also need the infrastructure for the domain that you own for the lync server.. you simply can't have cert for lync server
    LVL 20

    Expert Comment

    by:Jakob Digranes
    just to make sure I understand --
    on the inside, you have (and this is .com and not .local, .ad or .internal? )
    and on the outside you have

    I've used public certs only for one Lync installation - but this one needed both the external and internal domain names
    LVL 26

    Accepted Solution

    can i change the FQDN of my lync from to (one i own)?
    Yes, you can change the FQDN to any domain that you have.
    Be sure to re-run the topology builder again.

    Certificates are used to create a secure channel and provided that the correct CA or certificate chains are installed then it should work.

    Internal CA is not entirely needed as you can use self-signed certs internally but in your case I think it would be less complicated if you use the public certs.

    Is there any chance that there is an existing wildcard certificate for You should be able to re-use it in your Lync setup.

    Author Comment

    Thanks all for the input. After all alternative we have extended the retirement of out CA server so we don’t need to work on above requirement.

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