Connect Claude with M365

Question

Connect Claude with M365

Haschke Dennis 0

Hi,
i try to connect claude to M365.
I have set up the connector and i see the 2 App registrations in EntraID.

User's image

If i try to connect and login with my account i get an error like at the images shown.
Screenshot 2026-07-23 130005 User's image

What can cause this login problems?

Thanks and regards
Dennis

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1 answer

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Answer 1

Helen Luu 1,865 Independent Advisor

Hello @Haschke Dennis,

Based on the information you provided, I understand that you are experiencing an issue while integrating Claude with Microsoft for business. After reviewing the available information, I found a Claude documentation article that specifically addresses the "Couldn't reach the MCP server" error and outlines several troubleshooting steps that may help resolve the problem you are encountering.

Please review the following article:

Troubleshooting connectors - Claude.ai Documentation

This link is shared for your convenience. It points to a third-party site that is not managed or verified by Microsoft. We can’t guarantee the quality, safety, or suitability of any content or software found there. Please review carefully and make sure you understand any potential risks before using it.

The article includes guidance for common connector and MCP server connectivity issues, authentication failures, permission-related problems, and other configuration scenarios that may be relevant to your environment.

If the issue persists after following the troubleshooting recommendations provided in the documentation, I would recommend reaching out to Claude Support for further assistance, as they may be able to perform a more detailed investigation into the connector configuration and MCP server communication.

Please feel free to let me know if you have any updates or additional questions regarding this issue. I am looking forward to hearing from you.

Helen Luu 1,865 Reputation points Independent Advisor

2026-07-24T13:46:53.12+00:00

Hello, I hope you are doing well.

I am writing to follow up regarding the issue we discussed previously. I wanted to check whether you have had an opportunity to review the information provided and whether the issue has been resolved on your end.

I look forward to your response.
Haschke Dennis 0 Reputation points

2026-07-27T07:40:44.9133333+00:00

Hi,
thank you.
I have read the article but that hasn't been effective so far.
Some users can work with the connector. Some not.
I am continuing to analyze.

Regards
Dennis
Helen Luu 1,865 Reputation points Independent Advisor

2026-07-28T04:44:52.8133333+00:00

Hello,

You can try to contact the Claude Community or Claude Support team for further assistance, as they are best equipped to investigate issues related to their service.