I have migrated year 12 &13 student mailboxes into O365, but how do I apply the Exchange licence to all those users? They already have the student licence, but they need the Exchange licence adding on. I don't want to have to select about 200 users manually from a list that contains nearly 1000 users,
I thought I might be able to filter the list so that it only brings up users with mailboxes, but there does not seem to be an option for this.
Help would be greatly appreciated.