​Error moving user to Office 365 (onboarding)

​Error moving user to Office 365 (onboarding)
"The user doesn't have a matching SMTP address with target destination domain"
User has a mailbox on prem and need to be onboarded to Office 365
Resolution: Run dirsync and ensure user is fully synced. The mailbox on prem must have corresponding mail user in Office 365. Move was successful after dirsync