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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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“Skype for Business Server 2015, Backup Service central management backup module has backup data that never gets imported by backup pool.” is logged on primary server referencing the backup server

Problem You’ve recently failed over the CMS and pool from a primary Skype for Business Server 2015 to a backup server then failed the services back to the primary server but started noticing the following errors logged on the primary active server with the contents

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