Hi @Anonymous,
Thanks for your feedback. I have made a test on my side and don't have the issue that you mentioned. The Search field of "Get calendar view of events (V2)" action of Office 365 Outlook connector is still an optional field.
My flow's configuration as below:
Please check if the issue is solved on your side now, if the issue still exists, you could consider take a try to add the "Get calendar view of events" action to fetch all items within your flow instead of the "Get calendar view of events (V2)" action.
If you have other questions, please feel free to reply me here.
Best regards,
Kris
