Were having several issues with the Active Directory Probe and the import.
1: Not all OU`s are visible, in some containers the Users OU or Disabled accounts OU are not visible, so we cannot select them to be imported
2: We updated the 2.1 version to 2.3. to do so we needed to uninstall the 2.1 version. After installing the 2.3 we needed to config it again and select which OU`s needed to be imported. All other settings were lost to. So not to happy to update it to a newer version the next time.
3: After it failed to import a users do to an email adress issue, the complete schedule stopped and needed to be started again manually.