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Plan for Persistent Chat Server in Skype for Business Server 2015 - Skype for Business Server 2015 | Microsoft Learn
Terence Luk: Skype for Business client displays the message: “Your chat room access may be limited due to an outage.”
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Plan for high availability and disaster recovery for Persistent Chat Server in Skype for Business Server 2015 - Skype for Business Server 2015 | Microsoft Learn
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