You need to edit the file named "3CXWin8Phone.user.config", adding the name of your DLL to the following entry Located at: C:\ProgramData\3CXPhone for Windows\PhoneApp\3CXWin8Phone.user.config This line needs to be present for our software to be loaded: <add key="CRMPlugin" value="CallTriggerCmdPlugin,DotNetScriptPlugin,BusylightPlugin" /> The 3CXPhone logs located at "%AppData%\3CXPhone for Windows\Logs" will tell you what addins are being loaded. Please

We don't yet have an integration for the V18 Desktop Client, but that doesn't necessarily mean that it won't work. If you're running a 3CX Server V18, you can still use this with the 3CXPhone for Windows V16. Find more information in the 3CX Compatibility Chart. 3CX Compatibility Chart