When changes happen in your organization, the person who originally created the meeting or meeting series might not always be available to make updates
Options
Assign edit or delegate access to another person
The owner of the original calendar events or an M365 admin can assign permissions to another person to manage the events on behalf of them - learn more
Convert user to Shared Mailbox
An IT admin can convert the original users' calendar to a shared mailbox and assign permission to additional users to manage that calendar - learn more
Re-create Meeting Series with new user
If above options are not feasible, you can re-create the meetings or the meeting series from a new account. By storing the Agenda in the same Team/Group/Channel you will still have access and continuity across the meetings.
