Modify Send As Permission Exchange 2010

Open Exchange Management Console

 

Click Yes on the User Account Control Dialog if it appears



On the left hand side of the screen, navigate to Microsoft Exchange -> Microsoft Exchange On-Premises -> Recipient Configuration

 

Select Mailbox


Right click on the users mailbox you wish to send on behalf, and select Manage Send As Permission…



Click Add…

 

Select the name of the user you wish to give access to, and click OK
 

Click Manage
 

Click Finish   You can also accomplish this by using Powershell.  In this example, Andrew will be given Send As permission on Craig’s mailbox:

Add-ADPermission Craig -User Andrew -ExtendedRights "Send As"

You can also use groups.  In the example below, the group called Sales Users will be given Send As
permission on Craig's mailbox:

Add-ADPermission Craig -User "Sales Users" -ExtendedRights "Send 
As"

To removing Send As:

Remove-ADPermission Craig -User Andrew -ExtendedRights "Send As"

This will prompt for confirmation, and the confirmation warning is a bit counter intuitive:

Confirm
Are you sure you want to perform this action?
Removing Active Directory permission "Craig" for user "Andrew" with access rights "'Send As'".
[Y] Yes  [A] Yes to All  [N] No  [L] No to All  [?] Help (default is "Y"): y

This means that this will remove Andrew's send as permission on Craig's mailbox.