Exchange 2013 - Freigegebenes Postfach in Outlook 2013 automatisch einbinden?

$mailbox = "sharedTestMailbox"  
$group = "GruppeXYZ"  

$mailboxFullRightUsers = Get-MailboxPermission $mailbox | ?{$_.AccessRights -eq "FullAccess" -and $_.IsInherited -eq $false} | %{$_.User.toString().split('\')[-1]}  
$groupMemberUsers = Get-AdGroupMember -Identity $group | ?{$_.ObjectClass -eq "user"} | %{$_.SamAccountName}  

# SendOnBehalf Recht geben
Set-Mailbox $mailbox -GrantSendOnBehalfTo $groupMemberUsers

# Füge Gruppen-Member zur Shared Mailbox hinzu die noch keinen Vollzugriff haben
Compare $mailboxFullRightUsers $groupMemberUsers -PassThru | ?{$_.SideIndicator -eq "=>"} | %{echo "Füge User '$_' der Mailbox hinzu"; Add-MailboxPermission $mailbox -User $_ -AccessRights FullAccess -InheritanceType All | out-null}  

# Entferne Permissions wenn User nicht mehr Mitglied der Gruppe
Compare $mailboxFullRightUsers $groupMemberUsers -PassThru | ?{$_.SideIndicator -eq "<="} | %{echo "Entferne User '$_' aus der Shared Mailbox"; Remove-MailboxPermission $mailbox -User $_ -AccessRights FullAccess -Confirm:$false | out-null}  

Add-ADPermission "DeineMailbox" -User "Domain\User" -Extendedrights "Send As"

$mailboxFullRightUsers = Get-MailboxPermission $mailbox | ?{$_.AccessRights -eq "FullAccess" -and $_.IsInherited -eq $false} | %{$_.User.toString().split("\")[1]}  

Get-Mailbox $mailbox | Add-ADPermission -User $group -ExtendedRights "Send As"  

# Mailbox deren Berechtigungen verwaltet werden
$mailbox = "maxmuster"  
# Gruppe deren Member auf die Mailbox berechtigt werden
$group = "MeineGruppe"  

# mailbox abrufen
$mb = Get-Mailbox $mailbox -EA Stop

# member der Gruppe abrufen
$groupMemberUsers = Get-AdGroupMember -Identity $group -Recursive | select -Expand SamAccountName
# Send-As ACLs der Mailbox abrufen
$mailbox_sendas_rights = $mb | Get-ADPermission | ?{!$_.IsInherited -and !$_.Deny -and $_.ExtendedRights -like 'Send-As' -and $_.User.toString() -notmatch '(SELBST|SELF)$'} | %{$_.user.toString().split('\')[-1]}  

# Member vergleichen
$compare = Compare @($groupMemberUsers) @($mailbox_sendas_rights) -PassThru

# Neue Gruppenmember "Send As" berechtigt zur Mailbox hinzufügen 
foreach($user in $compare | ?{$_.SideIndicator -eq '<='}){  
    write-host "Granting Send-As permissions to user '$user' for mailbox '$mailbox'." -F Green  
    $mb | Add-ADPermission -User $user -ExtendedRights "Send as" | out-null  
}

# User-Berechtigungen aus der Mailbox entfernen welche keine Member der Gruppe mehr sind
foreach($user in $compare | ?{$_.SideIndicator -eq '=>'}){  
    write-host "Removing Send-As permission for user '$user' from mailbox '$mailbox'." -F Yellow  
    $mb | Remove-ADPermission -User $user -ExtendedRights "Send as" -Confirm:$false  
}