How to batch unflag or mark flagged messages complete in Outlook?
It’s always easy for you to flag emails to mark them as important, so that you are able to quickly tell which email is important. However, what if you have already done the job related to the emails and want to mark them complete? Or you just accidently flagged several messages and then want to clear the follow-up flags? To do so, please read on and find out how.
Batch unflag multiple messages with context menu in Outlook
1. Hold "Ctrl" and click on each flagged message to select multiple items simultaneously.
2. Right click on any of the red flags, and then select "Clear Flag" in the right-clicking menu.

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Batch unflag multiple messages with Quick Steps in Outlook
Outlook has a "Quick Steps" feature that allows you apply multiple actions to a message with one click. To create a task with text of a message with "Quick Steps", please do as follow:
1. In the "Mail" view, on the "Home" tab, click "Create New" in the "Quick Steps" box.

2. Click "Choose an Action" to open the drop-down list of multiple actions. Then select "Clear flags on message".

3. The name of the action will be filled in the "Name" box automatically, you can change it if you want. Also, you can set a shortcut key for this action (here I set "CTRL"+"SHIFT"+"9" as the shortcut key), or edit the tooltip text. Then click "Finish".

4. Hold "Ctrl" to simultaneously click on the flagged messages that you want to unflag, then click on the newly created action; Or press the shortcut key you set. The follow-up flags are then removed.
Batch unflag or mark flagged messages complete in the Tasks view in Outlook
1. Shift your Outlook view to "Tasks" by clicking the "Tasks" button or pressing "Ctrl"+"4".

2. Hold "Ctrl" to simultaneously click on the tasks (flagged messages).
3. On the "Home" tab, in the "Manage Task" group, click on "Mark Complete" or "Remove from List" to mass mark the flagged messages complete or clear the fags on the messages.

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