This is part of the 4.2.2 release of the Microsoft 365 Moodle plugin suite for Moodle 4.2, version v20231010_m402.
Complete Release Note: https://github.com/microsoft/o365-moodle/releases/tag/v20231010_m402

The main feature introduced in this release is the support to Microsoft account UPN changes. The feature is described at https://docs.moodle.org/402/en/Microsoft_365#Support_Microsoft_account_UPN_changes.

Other changes in the local_o365 plugin in this release include:
- Support samaccountname in field mapping.
- Fix a performance issue on getting users with duplicate email address.
- Ensure "Secure cookies only" setting is enabled when checking Teams integration settings.
- Update check on file mime type when uploading user matching files.
- Reduce notification observer function debugging messages.
- Fix a bug in the user sync feature where it ignores the "create" option.
- Avoid unnecessary cleanup of SDS sync records.
- Avoid class "external_api" not found error.
- Avoid invalid Graph API call in calendar sync feature.
- Add missing configuration setting language string.
- Automatically unset system API user token if application access is enabled.
- Bug fix in upgrade script in processing system API user token.