![]() If you have feedback for TechNet Subscriber Support, Fish, Please remember to mark the replies as answers if they help and If you installed the latest July 2017 CU ,please follow this link to check steps of installing the latest CU. If you have a persistent char server ,please check the certification of persistent chat server from the root CA. ![]() To further troubleshoot the issue, please confirm the following information.Ģ.Before you installed the latest CU, was group chat IM normal?ģ.Do you have a standalone persistent chat server or create a contact group in the Lync client, send an instant message to a contact group, distribution group, or to multiple contacts that you select?Ĥ.Could you connect to SQL SERVER of your persistent chat?
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