> For the complete documentation index, see [llms.txt](https://docs.meta-inf.hu/email-this-issue/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.meta-inf.hu/email-this-issue/administration/mail-server-connections/microsoft-with-oauth2/troubleshooting-guides-for-microsoft-oauth2-connections.md).

# Troubleshooting guides for Microsoft OAuth2 Connections

- [How to fix "BAD User is authenticated but not connected" error​](https://docs.meta-inf.hu/email-this-issue/administration/mail-server-connections/microsoft-with-oauth2/troubleshooting-guides-for-microsoft-oauth2-connections/how-to-fix-bad-user-is-authenticated-but-not-connected-error.md)
- [How to fix "401 Unauthorized" error](https://docs.meta-inf.hu/email-this-issue/administration/mail-server-connections/microsoft-with-oauth2/troubleshooting-guides-for-microsoft-oauth2-connections/how-to-fix-401-unauthorized-error.md)
- [How to fix "key expires\_in " error](https://docs.meta-inf.hu/email-this-issue/administration/mail-server-connections/microsoft-with-oauth2/troubleshooting-guides-for-microsoft-oauth2-connections/how-to-fix-key-expires_in-error.md)
- [How to fix "Need admin approval" error](https://docs.meta-inf.hu/email-this-issue/administration/mail-server-connections/microsoft-with-oauth2/troubleshooting-guides-for-microsoft-oauth2-connections/how-to-fix-need-admin-approval-error.md)