IMAP OAuth support
Problem to solve
Microsoft will stop support basic authentication for IMAP in 2021 2H, so GitLab e-mail fetching won't work on these addresses.
Intended users
Users who use Microsoft (and maybe Google) online e-mail systems.
Further details
Proposal
Support OAuth for IMAP authentication.
Permissions and Security
Email replies
Documentation
Edited by Zoltán Janega