[2.3.0] Checkmk Werk 16631 created: check_mailboxes: Fixed handling of error "Not allowed to access Non IPM folder."

[//]: # (werk v2) # check_mailboxes: Fixed handling of error "Not allowed to access Non IPM folder." key | value ---------- | --- date | 2024-04-12T08:34:09+00:00 version | 2.3.0b5 class | fix edition | cre component | packages level | 1 compatible | yes Due to a recent change in Microsoft 365, the access to Exchange mailbox folders via the active check `check_mailboxes` could fail with an error message like this: ``` Unhandled exception: ErrorAccessDenied('Not allowed to access Non IPM folder.') ``` With this werk we update the version of the package `exchangelib` to v5.2.1, fixing the respective error handling.