Auto mark done for planner task when flagged email has been marked complete

Current Behavior:
When an email in Outlook is flagged for follow-up, a corresponding task is created in Planner under the “Flagged Email” section. However, if the user marks the email as Complete in Outlook, the related Planner task remains in the Not Started status.

Impact:
This creates inefficiency and confusion in task management. Users must manually mark the Planner task as completed even though the email was already marked complete, resulting in duplicate effort.

Proposed Solution:
Automatically update the Planner task status to Completed when the associated flagged email in Outlook is marked as complete.