Using ODMAD for migrating Users from Hybrid source to target domain in same tenant while retaining access to exchange online using target account

Dear Experts,

We have a single tenant with 2 Hybrid  domains ,source and target.AD connect server keeps syncing user from on prem to cloud from both domains.Email gets configured for standard users once they are synced in cloud.Using ODMAD we are migrating users and devices from source to target domain and AD connect server is syncing target users to cloud and creating new mail id with target domain. The requirement is that the target mail id should be able to see same mailbox as source domain OR the source mail id should get linked to target user id. IS it possible to do via Quest? Any clue or KB article for migration of users within same tenant?