Hi everyone,
I’m running into an issue when trying to add an MCP server as a tool inside an agent in Microsoft Copilot Studio.
What I’m doing: I create a new agent (I’ve also tested with existing agents), go to Tools, click “Add a tool”, select “MCP server”, and then enter a unique server name, a unique description, and the server URL (which is a valid MCP endpoint). I leave authentication set to None and click Create.
The issue is that I consistently get the following error: “Something went wrong. A custom connector with display name ‘[name]’ already exists in the environment. It may have been created by another user and may not be visible. Please specify a different name.”
What’s confusing is that this happens regardless of the name I use, even if it’s completely random. I’ve tried multiple different names, multiple agents (both new and existing), and I still get the same error every time. The connectors don’t appear to exist anywhere visible in the environment, so it feels like there may be hidden or orphaned connectors blocking new ones from being created.
Has anyone experienced this before? Is there a way to view or remove hidden or orphaned custom connectors? Could this be a permissions or environment-level issue? Or is there a known workaround to successfully add an MCP server?
Would really appreciate any guidance. Thanks in advance.
