Per University policy, your PennO365 student account (Outlook, Word, Excel, OneDrive, etc) will expire 60 days after your graduation date. For students graduating in May, this date is generally in mid-August. Once the account expires, you won't be able to access your Outlook account as well as other Office products (including OneDrive).
If your account has expired and you need an extension, please open a support ticket with GSE IT to restore your account to backup your important data. 30 days after your account expiration date (90 days after the graduation), your PennO365 account with your data will be permanently deleted. We won't be able to retrieve your data after this date.
To backup your email or create alumni email account, please see Email Tips for Graduating Students.