AD Connect & Office 365 mismatch

Job ID: 32828283

Budget: £20 – £250 GBP

Ohhhh I messed up... Grrrr

AD Connect sync done with Office 365 BUT, I ended putting in the wrong email addresses in AD mail field (firstname.surname@ instead of just first name@) and now, it decided to create new mail boxes for all 20 users in Office 365 and of course with the incorrect email. The original mailboxes are fine.

I need to resync and match up the correct AD accounts to Office 365 and I have no idea how. Yes, I've now corrected the email address but of course, its too late. I've tried hunting for a guide but soo many people talk about soo many ways, I'm not lost and blind with a banging headache :(

Are you a Microsoft AD / Azure pro?

Please bid accordingly.

PS. I've managed to correct one of the accounts, claims to be correct but the password won't sync.