[FEATURE REQUEST] M365 MCP Server Support for GCC

I'm trying to use Microsoft 365 MCP server for (microsoft365.mcp.claude.com) Claude Cowork 3P. Our organization (National Institutes of Health) uses Microsoft 365 GCC (Government Community Cloud).

In the device code authentication flow setup step, its loops indefinitely — I believe because it's pointing at commercial cloud endpoints (login.microsoftonline.com / graph.microsoft.com) instead of GCC endpoints (login.microsoftonline.us / graph.microsoft.us). Addiitonally, in the "Sign in & test" step for configuring this MCP server in Claude Cowork via third-party inference and "Bring your own client" OAuth set, it returns a commercial cloud issuer URL (login.microsoftonline.com) during the handshake, but my Cowork client is expecting the GCC URL (login.microsoftonline.us).

Is GCC support planned or available? If not, I would like to request a feature enhancement to be able to include it.