Required DNS Change for Lync Mobile in Office 365

    This post has matured and its content may no longer be relevant beyond historical reference. To see the most current information on a given topic, click on the associated category or tag.

    There are some required changes to get AutoDiscover for Lync Mobile to work with Office 365 in DNS. Create a CName entries for your Office 365 domain:

    lyncdiscover CNAME (i.e. resolves to

    You can find out more about the network and DNS requirements of Lync for Office 365 here (this in addition sip and srv entries):

    Of course, if your an Agile IT customer, we take care of all of this for you. Find out more at Update  – Users that have their Lync Address using may have issues logging in using Lync Auto Discover.  You can circumvent the DNS requirements by turning off “Auto-detect services” and setting the external discovery address:

    Note - You can leave the internal discover address blank.