When performing an Active Directory synchronization where some users have linked mailboxes, the following error may be seen:
" Error executing script 'ADS_PersonAuto_Mapping_ADSAccount'.
[System.Exception] Error assigning an employee to the Active Directory user account <user>.
System.AggregateException: One or more errors occurred. ---> VI.Base.ViException: Error during execution of 'OnSaved' in logic module 'VI.DB.Entities.EntityScriptLogic'. ---> VI.Base.ViException: EX0MailBox: The following fields are compulsory and need to be filled: Linked Mailbox."