Hi I am migrating user from source domain to target domain using ADMT tool. Source domain has dirysync to office 365 and when i migrate a user ,the mails are not working for the migrated user. IS there any process i need to follow particularly . I saw so many places on web , where it says break sync from source domain and migrate user to new domain and then sync with this so it will not have an issue. But i am concerned that if i break dirsync will all the accounts get migrated to cloud ? What if the new domain doesn't sync to office 365 ? How will this work.
Note: Both domains are verified in office 365