Customer has had a change of staff.

We created a new Person, and tried to create a new Mailbox - but there are no free licenses for a new mailbox.

We tried a number of methods for deleting old mailboxes. Note that there are NO mails in any mailbox, these mailboxes were only created because SERP requires them. When clicking the Properties button when viewing Mailboxes, nothing happens. SERP does not open the properties for any existing mailbox, so we can't delete the mailbox.

How can we proceed? If the new user logs in, we get a message that it's not possible for other users to log in.

Stephen