Somehow a user was created in AD and synced in UPS, the user had a username something like domain\xxx1. The user was then deleted in AD and a new one with the same email/sip was created but with the username domain\xxx2. Since then the account only syncs data with AD but not with any of the BDC models (SQL server views), all other accounts are syncing fine. If we change any data in AD for the broken account it gets propagated to SP fine. I had a look in the FIM client manager and can see that the only connector for the account is AD:
I tried to delete the account in central admin and resync but it still only gets data populated from AD. What do I need to do here to make this account sync with AD and our BDC models again?