Unable to connect to 2FA-enabled O365 OneDrive

[didierm]

Steps to reproduce

1. install nextcloud/sharepoint app
2. create O365 OneDrive external storage, according to provided documentation at https://github.com/nextcloud/sharepoint#how-to-add-office-365-onedrive

Expected behaviour

connectivity to the (Sharepoint-based) O365 OneDrive share

Actual behaviour

NextCloud error :
"External mount error
There was an error with message: Empty response from the server"

Server configuration

NC21

More info

• The O365 OneDrive share is protected with 2FA (TOTP).
• The nextcloud/sharepoint app documentation is copied verbatim from rclone (with its reference : https://rclone.org/webdav/#sharepoint-online ), but omits this specific (and essential) rclone clause : "... If you have 2FA enabled, you have to generate an app password. ..."

If nextcloud/sharepoint is unable to cope with 2FA, this should be highlighted in the documentation.

[didierm]

FYI, this nextcloud app describes a procedure to use OAuth2 with OneDrive by creating a OneDrive app :
https://github.com/hevelius/files_external_onedrive#configuring-oauth2

[didierm]

NC log output :

"Authentication Failure : AADSTS50076: Due to a configuration change made by your administrator, or because you moved to a new location, you must use multi-factor authentication to access"

nc-sharepoint.log