For users who have previously used Lync or Skype, they will often not be able to send offline messages, and the Skype for business Server CU3 starts with offline IM support, but it is also very demanding for clients.
Offline IM is a client-side feature built into the Skype for business client (2016C2R build 16.0.6701.1000 or later) that leverages Exchange Web services (EWS) from Skype for business The client sends a message to the user's Exchange mailbox. Offline IM uses Exchange Web Service (EWS) to send offline messages from the Skype for business client to the recipient's mailbox. The Skype for business client must be able to use EWS to send offline messages. For more information, refer to the TechNet Link:
Https://technet.microsoft.com/en-us/library/mt756734.aspx
Prior to this, I have deployed Exchange Server CU4 and the Skype for Businessserver 2015 environment, which describes how to update the Skype for business Server 2015cu4 and enable offline IM features.
https://support.microsoft.com/en-us/kb/3061064
To stop the Skype service, if the enterprise version of multi-front end of the case also need to follow the above link to check the replication situation and switch the master node, because my side is the test environment and is the standard version, directly stop the service, run the downloaded installation package.
650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/8B/F7/wKioL1hd9f3gc-zBAAAdM9d4qL8346.png "title=" 1.png " alt= "Wkiol1hd9f3gc-zbaaadm9d4ql8346.png"/>
650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M01/8B/FB/wKiom1hd9gbiY6u5AABGlcWmLVY677.png "title=" 2.png " alt= "Wkiom1hd9gbiy6u5aabglcwmlvy677.png"/>
650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M01/8B/FB/wKiom1hd9g_S3yAPAABd8Um7oQg376.png "title=" 3.png " alt= "Wkiom1hd9g_s3yapaabd8um7oqg376.png"/>
650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M01/8B/F7/wKioL1hd9hvQLKMzAABO_2Reuk0884.png "title=" 4.png " alt= "Wkiol1hd9hvqlkmzaabo_2reuk0884.png"/>
650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M02/8B/FB/wKiom1hd9ieR4ZwuAAAlEQCHkU4122.png "title=" 5.png " alt= "Wkiom1hd9ier4zwuaaaleqchku4122.png"/>
Install-csdatabase-update–localdatabases
650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M02/8B/FB/wKiom1hd9j3B5MYxAACM-gtxPIU992.png "title=" 6.png " alt= "Wkiom1hd9j3b5myxaacm-gtxpiu992.png"/>
650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M02/8B/F7/wKioL1hd9keRBD4mAAEgZdsAy0s718.png "title=" 7.png " alt= "Wkiol1hd9kerbd4maaegzdsay0s718.png"/>
650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M00/8B/FB/wKiom1hd9lHCwh4fAAAr0wuQ6ws901.png "title=" 8.png " alt= "Wkiom1hd9lhcwh4faaar0wuq6ws901.png"/>
650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M01/8B/FB/wKiom1hd9l2BsRtjAAA1BiTsn7s914.png "title=" 9.png " alt= "Wkiom1hd9l2bsrtjaaa1bitsn7s914.png"/>
650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M02/8B/F7/wKioL1hd9mnxA9ZLAABLNZ_NbrI995.png "title=" 10.png "alt=" Wkiol1hd9mnxa9zlaablnz_nbri995.png "/>
650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M00/8B/FB/wKiom1hd9nWxWEY7AABly0pIGfs408.png "title=" 11.png "alt=" Wkiom1hd9nwxwey7aably0pigfs408.png "/>
650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M01/8B/F7/wKioL1hd9oGTQF-AAABa0Ic7bUY399.png "title=" 12.png "alt=" Wkiol1hd9ogtqf-aaaba0ic7buy399.png "/>
650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M02/8B/F7/wKioL1hd9o3xhPmbAABtkKWr6-I003.png "title=" 13.png "alt=" Wkiol1hd9o3xhpmbaabtkkwr6-i003.png "/>
~~ above is my share, welcome to exchange, thank you for your support ~~
This article is from the "Huang Jinhui column" blog, be sure to keep this source http://stephen1991.blog.51cto.com/8959108/1885715
Skype for Business Server 2015 offline messages