Shared mailboxes, aliases and groups

Exchange objects, rights, addresses, and Google Groups.

5 min read

The addresses your customers write to, and the people allowed to answer. MigrateX recreates shared, room and equipment mailboxes with their contents, their rights and every extra address, and moves groups with their members.

On the Shared & groups tab

  1. Read againLists every shared, room and equipment mailbox and every distribution list, mail-enabled security group and Microsoft 365 Group in the source.
  2. Match the people firstRights and membership are re-granted to matched people. Unmatched ones are listed as notes.
  3. Migrate selectedThe mailbox is created in the target, its contents copied (half a license), Full Access and Send As re-granted, aliases added. Groups are free.
  4. Apply aliases at cutoverExtra addresses on the source domain can only exist in the target once the domain has moved. The cutover wizard applies them at the right moment.

What moves

ObjectMicrosoft 365Google Workspace
Shared mailboxRecreated with contents, Full Access, Send As, aliasesBecomes a Google Group with a collaborative inbox
Room / equipment mailboxRecreated with its type and contentsBecomes a Calendar resource where the API allows; listed otherwise
Distribution listRecreated with members and ownersGoogle Group with members
Microsoft 365 GroupRecreated with members and owners (Planner listed)Google Group
User aliasesEvery proxy address, at cutoverEvery alias, at cutover
The MigrateX app needs the Exchange Administrator role for this part.Rights, aliases and distribution lists aren't in Microsoft Graph, so MigrateX uses Exchange Online for them. Assign the role to the MigrateX app in each tenant (Entra ID → Roles and administrators → Exchange Administrator → Add assignment).