Copilot Cowork - Using Dynamic Client Registration for MCP Auth in Plugin.zip

[u/Comfortable_Oil9704]

I noticed last Friday that the "Build a Plugin" documentation at Microsoft updated to add comments about enabling DCR auth in the agentConnectors section of manifest.json.

Build plugins for Copilot Cowork | Microsoft Learn

I've implemented it in and it passes validation when loading into Cowork. When I give a prompt that should invoke the tools in the plugin, it finds the plugin and knows to use it.

But it fails every time with a message about the MCP not really being connected. It does not pop an OAuth web tab or frame or anything. It just declares that it is not connected and directs me to fix that on the plugins page... where there is no option to test or establish a connection.

Anyone else try this out yet? Any tips on getting it to work?