Latest in the SFB KB/CU updates:
Standouts:
- Can’t sign in Skype for Business mobile apps after applying Skype for Business Server 2015 CU6
Improvements and fixes in the March 2018 update
- 4036626 Missing ApplicationOptions attribute in user object created by New-CsHybridApplicationEndpoint cmdlet in Skype for Business Server 2015
- 4078589 High memory usage on RtcHost.exe when you deploy Shared Line Appearance in Skype for Business Server 2015
- 4078588 Can’t sign in Skype for Business mobile apps after applying Skype for Business Server 2015 CU6
- 4078590 Calls to Mac fail when enhanced presence privacy mode is enabled in Skype for Business Server 2015
- 4078592 Push Notification not working for Skype for Business for iOS in Skype for Business Server 2015
- 4078587 Voice settings are intermittently reset in Skype for Business on iOS and Android
ref: https://support.microsoft.com/en-us/help/3061064/updates-for-skype-for-business-server-2015