So the answer is yes it is gone through the ECP and is now in Exchange PowerDOS
Well, if you Disable a mailbox it is not shown as disabled until 24 to 48 hours in the ECp. Also deleting the mailbox doesn’t translate on space save as the space is not changed on the DB.
Not worried about space. We created a shared mailbox for a calendar and then they wanted to change the name of it so instead of creating a new mailbox I changed the name and alias and then found that not to be working right so I tried to create the right name and boogered it all up.
All good now though.