Customize your mailbox migrations by selecting to copy emails, calendars, contacts, and mailbox rules.

To access the Copy options, follow the steps in the Copy mailboxes overview article until you have selected your destination tenant.

Select what items you want to copy in your mailbox migration.

Copy the messages in your mailboxes.

Select the last 90 or 180 days or use custom dates from the dropdown.

Include junk emails in your copy.

Include deleted emails in your copy.

Include In-Place Archives in your copy.

Copy calendar events created or modified by the mailbox owner.

By default, this includes:

Copy single and recurring past calendar events. Some limitations apply.

Select a starting date from which all single and recurring calendar events are copied.

If you choose to have new Teams meeting links at the destination, you will have two active meetings for the same event during the migration—the one from the source and the one created at the destination.

When you use that option, users could confuse the source and destination meeting invitations and miss the meeting.

While this shouldn't be a problem if you communicate the transition to your internal users, external attendees might miss meetings if they don't understand why they received a second invitation.

Copies your litigation hold settings with the option to replace destination holds with the source.

This option will only copy your Litigation hold settings. We recommend reading the article Copying mailbox - Litigation hold settings before using this option.

Copy contacts in your mailboxes.

Copy rules in your mailboxes.