How to prevent Outlook from deleting text as I type in an email?
In some cases, even if you have not pressed the Insert key on the keyboard, it automatically deletes text as you type in a composing email in Outlook as below screenshot shown. Oops! This article will guide you to fix this problem and prevent Outlook from deleting text as you typing in emails.
Prevent Outlook from deleting text as I type in an email
Please follow below steps to prevent Outlook from deleting text as you type in composing emails.
1. Click Home > New Email to create a new email.
2. In the opening Message window, please click File > Options.
3. Now you get into the Outlook Options dialog box, please click Mail in left bar, and then click the Editor Options button. See screenshot

4. The Editor Options dialog box comes out. Please click Advanced in left bar, and uncheck the Use overtype mode option and the Use the Insert key to control overtype mode option. See screenshot

5. Click the OK buttons successively to close the dialog boxes, and close the new email without saving.
From now on, it will never delete text as you type in any composing emails in Outlook.
Quickly search and delete duplicate emails in Outlook
With Kutools for Outlookβs Duplicate Emails feature, you can quickly find and delete them from multiple mail folders, or find and delete all duplicates from the selected ones with two clicks in Outlook.

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