When using AD Connect to sync on-prem AD with Azure AD for Office 365, I've got an issue where when one user syncs they're being setup as a mail-user and thus created as a contact, not a mailbox.
There is a bit of history, as this user left and had their mail forwarded probably as a mail contact when their was a hybrid/transitional setup. So, I'm wondering if their is something still in Active Directory that thinks this user is still a contact.
Any suggestions would be great.
Thanks