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Troubleshoot : Voice / Video Calls & Desktop Sharing not working 1. Make sure VoIP Server is running. In Windows Services make sure “Output Messenger VOIP” service is running. You can also verify it in Server Manager tool.; If Output Messenger VoIP Service is not running, Server Manager > General > Start “Output Messenger VoIP” service. 2. How do I video chat with someone or a group in Messenger To make a voice or video call from the Messenger app, tap the phone or video icon a the top of a conversation. Note: Messenger calls may use your existing data plan. To make a voice or video call from the Messenger app, tap the phone or video icon a the top of a conversation. Note: Messenger …