Forum Discussion
Only meeting organizers can make changes (Shared Mailbox)
If you open the meeting in the shared mailbox's calendar, scroll down to meeting options the user should be able to assign him/herself co-organizer enabling all meeting options
psantus https://support.microsoft.com/en-us/office/add-co-organizers-to-a-meeting-in-teams-0de2c31c-8207-47ff-ae2a-fc1792d466e2#:~:text=1%20Select%20your%20meeting%20and%20then%20choose%20Edit.,Select%20Save%20at%20the%20bottom%20of%20your%20screen.
You can do that only from the meeting options... which you can't reach if the meeting organizer is a shared mailbox
I had the same issue when I tried to access meeting options using a "Meeting options" link in a meeting invitation. (Actually I see the same error message also for meetings I create using my mailbox, not a shared mailbox...)
I struggled, but in the end I could access the options using the "Meeting Options" button in the ribbon bar in Outlook.
https://images.app.goo.gl/3PL9t8X8ErUDfVui7
Do you see the button in your Outlook?
