Powershell-Befehle:

1. Connect-ExchangeOnline -UserPrincipalName ADMINUSER

2. New-ManagementRoleAssignment –Name:visomatickets –Role:ApplicationImpersonation –User: "VERSANDUSER"

3. Get-Mailbox -ResultSize unlimited -Filter {(RecipientTypeDetails -eq 'UserMailbox') -and (Alias -ne 'Admin')} | Add-MailboxPermission -User "VERSANDUSER" -AccessRights fullaccess -InheritanceType all