安裝Skype for Business Server 2019 CU2之前，您需要知道的一件事

最新SFB2019 CU2更新出來了，看起來修複了好多東西，下文中我标黃的KB應該是可以值得關注的，大家可以考慮一下更新這個CU.

但釋出這篇文章的重點在于從SFB2019 CU1開始，它的安裝步驟與SFB2015/Lync2013有一點點的不同（大坑），如果沒有看清楚安裝說明就會出大問題。

與SFB2015 CU的安裝差别就在于第三步需要把一些前置功能安裝上（用于使用最新的SFB控制台，基于HTML5技術無須再安裝Silverlight）。假設不安裝這些前置條件有影響嗎？功能上面沒有影響，服務也是正常的，但是如果你想再次運作SFB Setup來更新元件的時候，就會報前置條件還沒有安裝完整的錯誤。

到這裡，同學又要問了：大不了把前置條件上不就行了嗎？對的。

但是大坑來了，如果你的環境是從Lync or SFB2015 更新到SFB2019的時候，我們是需要做一次遷移CMS的工作（Move-CsManagementServer）, 它會自動進行一系列的自動化遷移工作，最後一步就是自動跑一次bootstrapper.exe同時把SFB前置功能元件都檢查一次，杯具的事情來了，由于你安裝了CU2但沒有把前置功能都安裝上，導緻CMS遷移失敗，報錯，同時如果你想再遷移CMS也是遷移不成功的。

是以安裝SFB2019 CU之前，務必把以下功能都安裝一次：

Add-WindowsFeature RSAT-ADDS, Web-Server, Web-Static-Content, Web-Default-Doc, Web-Http-Errors, Web-Asp-Net, Web-Net-Ext, Web-ISAPI-Ext, Web-ISAPI-Filter, Web-Http-Logging, Web-Log-Libraries, Web-Request-Monitor, Web-Http-Tracing, Web-Basic-Auth, Web-Windows-Auth, Web-Client-Auth, Web-Filtering, Web-Stat-Compression, Web-Dyn-Compression, NET-WCF-HTTP-Activation45, Web-Asp-Net45, Web-Mgmt-Tools, Web-Scripting-Tools, Web-Mgmt-Compat, Windows-Identity-Foundation, Server-Media-Foundation, Telnet-Client, BITS, ManagementOData, Web-Mgmt-Console, Web-Metabase, Web-Lgcy-Mgmt-Console, Web-Lgcy-Scripting, Web-WMI, Web-Scripting-Tools, Web-Mgmt-Service

下載下傳連結：https://www.microsoft.com/en-us/download/details.aspx?id=58347

Knowledge Base: KB4470124 ： https://support.microsoft.com/en-us/help/4470124/updates-for-skype-for-business-server-2019

以下具體的更新内容供各位參考 This update fixes the following issues:

• 4525498 Ability to add server roles in tri-existence mode will be blocked in Skype for Business Server 2019
• 4525496 Skype for Business Server 2019 continues to write to CLS ETL even after CLS logging is stopped
• 4507233 Enterprise users can't request control of an anonymous user's shared screen in Skype for Business Server 2019
• 4507232 Resuming a PSTN call that was put on hold results in one-way audio in Skype for Business Server 2019
• 4510851 SCOM SQL alerts are created every hour on SQL secondary replica server if "Always On" for Monitoring server is set in Skype for Business Server 2019
• 4510844 Can't find the response group agent that's synced from an existing distribution list in Skype for Business Server 2019
• 4510855 Can’t edit interactive RGS workflows via the web interface in Skype for Business Server 2019
• 4526182 In-a-meeting and Presenting presence states are available for UCWA clients in Skype for Business Server 2019
• 4510850 Skype for Business on Mac user's latest photo can't be seen until signing in to a Windows client in Skype for Business Server 2019
• 4510846  "InstallDatabaseInternalFailure: An internal error has occurred…" error when you install new databases in Skype for Business Server 2019
• 4525504 bootstrapper.exe doesn’t work in Skype for Business Server 2019
• 4511313 "Too many outstanding requests for a single user" error occurs on Front-End servers in Skype for Business Server 2019
• 4532748 New registry key "\SOFTWARE\Microsoft\ExchangeServer\v15\MSExchange OWA" for Skype for Business Server 2019
• 4503584 “The Audio/Video Conferencing Server has failed to create a conference” error (ID 32005) occurs on Audio/Video Conferencing Server in Skype for Business Server 2019
• 4525500 Users who’re not Enterprise Voice enabled can dial out when PreventPSTNTollBypass is true in Skype for Business Server 2019
• 4525499 Call forwarding and voice mail not working for LBR users who're signed out of all clients in Skype for Business Server 2019
• 4518680 Can’t transfer external calls by using Polycom VVX phones in Skype for Business Server 2019