WSU student email accounts are lifetime accounts, meaning they do not expire after you leave the university. Passwords will continue to expire every 180 days, so you will need to go to http://account.wsu.edu to reset your password.
WSU employee email accounts are deleted on a date determined by the employee's department. This date is set during the departure process.
Office 365 software is only available to students and employees while they are actively enrolled or employed at WSU. When this association ends, these subscriptions are cancelled in about a week. If your connection to WSU is ending and you want to buy a new subscription, you may do so at https://products.office.com/en-us/buy/office. If you do not do so, you will want to download to your local computer any documents that you may have in OneDrive, if you have used that service.