└ at .(String prereq)Īt .(String prereqName)Īt .(Action`1 action, T arg) └ Error: Prerequisite installation failed: MicrosoftIdentityExtensions

└ Method used to check prerequisite state: MicrosoftIdentityExtensionsRequired() 4:40:16 PM ▼ Install prerequisites 4:40:16 PM Failed └ Name of prerequisite: MicrosoftIdentityExtensions 4:40:16 PM Once I added the Front-end server in the Skype for Business Topology and published it, I began starting the installation and received an Error 1603: I was deploying a new Skype for Business Front-End Server, after installing all the pre-req software as per the Server requirements for Skype for Business Server 2015 where they also have a powershell command in order to install the OS features required to support the Skype for Business Front-end Server: 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, NET-WCF-HTTP-Activation45, Web-Asp-Net45, Web-Scripting-Tools, Web-Mgmt-Compat, Desktop-Experience, Telnet-Client

Skype error codes