Exchange 2010 – Add SendAs permissions from MailboxPermissions

Posted by robd on July 24, 2016
exchange 2010, powershell

To add send as permissions from the existing permissions on a mailbox you can use this script:

All you need to do is specify the username twice:

$users = Get-MailboxPermission -identity "USERNAME" | where {$_.user -notlike "*SELF" -and $_.isinherited -eq $false}
foreach ($user in $users)

    $mailboxuser = get-aduser  "USERNAME"
    Add-ADPermission -Identity $mailboxuser.DistinguishedName -ExtendedRights Send-As -User $user.user

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