[2.2.0] Checkmk Werk 16636 created: check_mailboxes: fix issue with EWS distinguished folder

Title: check_mailboxes: fix issue with EWS distinguished folder Class: fix Compatible: compat Component: checks Date: 1715759263 Edition: cre Level: 1 Version: 2.2.0p27 The active check "check_mailboxes" could fail with a <code>KeyError: 'folders'</code> when trying to retrieve an exchange mailbox's folders via the EWS protocol. With this werk the used library <code>exchangelib</code> is updated to v5.4.0, which prevents the underlying issue in retrieving certain exchange folders.