Hi Michael, I hope, you are talking about Office 365 account. In this case, you need to contact the Office 365 support to re-enable her account. If you have admin account, you could probably try resetting her credential in Office 365 admin portal, but I doubt, it will give any fruitful result.
Vote up or Mark as Answered, if this information helped you.
Kind Regards - Kunal Chowdhury | Microsoft MVP (Windows Development), Windows 10 Champion
Checkout my 'Technical blog': http://www.kunal-chowdhury.com