If your organization is currently using Education Edge, the education information can be added through the integration processes, please see solution ID: BB217496
If Education Edge integration is not an option, previous data can be retrieved from previous database backups, please see solution ID: BB302349 for information on how to recover deleted information.
If database recovery is not an option, this information can be obtained through contacting Alumni via email eBlast with a request to update their profile information through the website. Please see the Email User Guide for more information on how to create email messages: http://www.blackbaud.com/files/support/guides/bbnc/emailre.pdf
If your issue is still unresolved, Contact Support and reference this article.