For Generic accounts, instead of creating multiple emails in order to get more Adobe CC licenses, you can simply create an alias in Office 365 of an existing email.
1. User Management >> Edit User
2. Search for a User
3. Edit Username/Email/Aliases
4. Add New Email Alias
- Enter the new email address
- Press Add
5. Verify and Save
You may need to click out and click back in for the changes to be visible.