Good day! Thank you for reaching out to Microsoft Q&A forum and sharing the detail.
Based on the error message “Something doesn’t look right,” here are a few steps I recommend to further isolate and help locate the issue:
- Ensure you’re listed as both the group owner and a member
Even if you created the group, make sure your account is also added as a member, not just an owner. This is required for full management capabilities in Outlook. - Use Cached Exchange Mode in Classic Outlook
If you’re using the desktop version of Outlook, please confirm that Cached Exchange Mode is enabled. This setting is important for group functionality. Kindly refer the official document from Microsoft: Turn on Cached Exchange Mode - Microsoft Support - Try managing the group in Outlook Web App or Microsoft 365 Admin Center: as an alternative, you can try adding members through Outlook on the web or the Microsoft 365 Admin Center. This may bypass any client-side issues. Please refer: Add, edit, and remove members of Groups in Outlook - Microsoft Support
- Clear Outlook local cache: if you’re on the desktop app, consider clearing the Outlook cache or removing and re-adding your profile. This has resolved similar issues in other cases.
Please update to me after troubleshooting and should you have any further questions, please feel free to reach out.
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