After migrating calendar items from Google Apps to Office 365, some migrated meetings appear as if they were never send to meetings participants. Opening these meetings in Outlook will show "You haven't send this meeting invitation yet".
When the appointments are migrated from the source the ODME tool creates appointments on the target by generating a meeting invitation on the target that matches the source meeting, then accepting it on behalf of the mailbox the tool is migrating, and then deleting the meeting invite.
This method allows the tool not to generate any additional appointment invitations for attendees on these meetings.
Edit these migrated meetings and send updates to specified attendees.
Enhancement request number TFS442097has been submitted to Development Department to add it as a Known Limitation.