Shortly after students graduate, their Microsoft 365 license changes from the full student license to an email only license. As such, they are no longer licensed to use OneDrive and may not see or be able to access the "OneDrive" icon in the Microsoft 365 app launcher. This does not indicate that their OneDrive has been deleted, but it does mean that they need to use the direct web address to access their OneDrive content. That address is:
https://drexel0-my.sharepoint.com/personal/<username>_drexel_edu
The <username> is the first part of their short-form email address. For example, if their Drexel email address is abc123@drexel.edu, they would use this address to access their OneDrive: https://drexel0-my.sharepoint.com/personal/abc123_drexel_edu
At some point (typically ~3 months after graduation), their OneDrive will actually be deleted. If they try the direct web address and a "404" error is returned, then it has been deleted. In extenuating circumstances, deleted OneDrives can be restored. The restore request must be received and processed within 93 days of the OneDrive's deletion and the content can be restored for a total of 5 business days. Please submit a request for restoration (if possible) here: Request Form - Microsoft SharePoint