I'm trying to use the built in m365 connector - I added
{"name": "Microsoft 365","server":"microsoft365","tenantId":"xxx","clientId":"xxx"}
to our managed mcp servers - following https://claude.com/docs/cowork/3p/connectors-m365#local-connector
when trying to connect, the browser doesn't open and I have in the mcp-server-office365-builtin.log:
{"severity":"ERROR","message":"[ERROR] local_auth_browser_open_failed","timestamp":"2026-06-16T21:52:11.954Z","event":"local_auth_browser_open_failed","spawnErrorCode":"exit_3"}
{"severity":"ERROR","message":"[ERROR] local_auth_interactive_trigger","timestamp":"2026-06-16T21:52:11.958Z","event":"local_auth_interactive_trigger","platform":"linux","outcome":"failure","errorType":"LocalAuthBrowserLaunchError"}
{"severity":"ERROR","message":"[ERROR] tool_outlook_email_search_failed","timestamp":"2026-06-16T21:52:11.964Z","event":"tool_outlook_email_search_failed","toolName":"outlook_email_search","errorCode":"INTERNAL_ERROR","errorType":"McpError","graphHost":"graph.microsoft.com"}
I'm trying to use the built in m365 connector - I added
{"name": "Microsoft 365","server":"microsoft365","tenantId":"xxx","clientId":"xxx"}to our managed mcp servers - following https://claude.com/docs/cowork/3p/connectors-m365#local-connector
when trying to connect, the browser doesn't open and I have in the mcp-server-office365-builtin.log: