Adobe account issue (multiple accounts?)

Within our enterprise we have had users with personal licences for Adobe acrobat pro. We have recently migrated them to an enterprise licence so we can manage them within the portal and they can use SSO 

However, a user is now unable to use Acrobat pro as they are getting the attached error

The account the user was signed into previously was using the same email address, so presumably the software is defaulting to that account rather than the new one with the enterprise licence. Signing out unfortunately has not helped, is there anything we can do to remove this account and then resign the user back in with the new credentials?