This response result of a plea for an answer via Private Messages.
Version 3.8 of core is old and no longer supported ...
That goes for the o365 plugin to core as well.
Please see:
https://moodle.org/plugins/local_o365
This plugin is updated with stable Moodle releases. This means as of October 2022:
The versions for Moodle 3.11 and 4.0 gets full support. Any new features are guaranteed to be added to these two versions.
The version for Moodle 3.9 gets security support. New features are not to be added to this version, but some bug fixes may be added.
All other versions, included the one for Moodle 3.10, are out of support.
This plugin is updated with stable Moodle releases. This means as of October 2022:
The versions for Moodle 3.11 and 4.0 gets full support. Any new features are guaranteed to be added to these two versions.
The version for Moodle 3.9 gets security support. New features are not to be added to this version, but some bug fixes may be added.
All other versions, included the one for Moodle 3.10, are out of support.
'SoS', Ken