After the last user has migrated to the new Exchange server, we run MNE’s Groups Provisioning Wizard to provision Notes groups into Active Directory as distribution groups. Groups information was earlier extracted from the Domino source and copied into the SQL database by MNE’s Directory Export Wizard.
If appropriate, we might also configure ongoing directory synchronizations between the source and target directories. Then, when the users and groups are all migrated, mail routing can be permanently updated to direct external incoming (Internet) mail to Exchange instead of to Exchange, and remove the smart hosts we used to route mail internally.
Finally, if we have no further need of the Notes/Domino environment, we verify that the old Domino server is no longer processing any mail traffic, and then delete the temporary migrate.domain.com domain and decommission the Domino server.