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On-prem Skype for Business Server 2015 federation with Skype for Business Online logs the event: “Unable to resolve DNS SRV record”;domain=”fabrikam.com”;dns-srv-result=”NegativeResult”;dns-source=”WireQuery”;source=”sip.contoso.com”

Problem You’ve configured your Skype for Business Server 2015 SIP FEDERATED PROVIDERS to federate with Skype for Business Online domains: … but notice that one of the domains you are trying to reach is listing the presence information of the contact as Presence unknown: Attempting

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