How do you grant an account full access to all the mailboxes in Exchange 2013 ?

In Exchange 2007-2010 you could use the following command:

Get-Mailboxdatabase | Add-AdPermission -User domain\user -AccessRights GenericAll

But that does not appear to work any more.

I've tried adding the user to the "Organizational Management"  admin role, but I still cannot  "open another mailbox"

Please let me know if you can help

Hi,

I believe that's because you're using the get-mailboxdatabase commandlet, and not the get-mailbox commandlet, and also the command for adding full mailbox permission should be the add-mailboxpermission commandlet.

Try this one:

get-mailbox -resultsize:unlimited | Add-MailboxPermission
-user "The user togive access to" -accessrights fullaccess -inheritancetype All