Lync – Office 365 Federation Presence Unknown
Apr02

Lync – Office 365 Federation Presence Unknown

A customer was having problems with their Lync 2010 deployment federating with Office 365.  When searching for a Lync Online user they would see “Presence Unknown” and be unable to send Instant Messages.  They could Federate with other On-Prem Lync organisations OK.  They had LyncOnline configured as a Hosted Provider and Partner Domain Discovery Enabled (Dynamic Federation).  Their _sipfederationtls._tcp DNS record was...

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