IMAP on 365: User is authenticated but not connected

Technical assistance
#1

Infos:

  • Used Zammad version: 5.0.x community
  • Used Zammad installation type: docker-compose
  • Operating system: CentOS
  • Browser + version: Chrome

Expected behavior:

Open ticket from mail
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Actual behavior:

After some days of correct working, now Mail configuration retur an error and doesn’t download mail: Can’t use Channel::Driver::Imap: #<Net::IMAP::BadResponseError: User is authenticated but not connected.>
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Steps to reproduce the behavior:

#2

The problem was the license assigned to the mailbox on O365 portal.
License Micosoft 365 Business Basic with IMAP enabled works fine.

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