Outlook in Office 2021 not Opening

How to Fix Outlook App Not Opening Issue?

1.Start outlook in the safe mode and disable add-ins

To do this,

1. Firstly, choose Start > Run.

2. Secondly, type Outlook /safe, and click OK.

3. After that, in the Choose Profiles dialog box, accept the default setting of Outlook and click OK.

4. Finally, enter your password and click on Accept button.

2. Create a new outlook profile to Fix Outlook App Not Opening

1. Firstly, choose Start, and then type Control Panel.

2.Secondly, choose Show Profiles > Add.

3. Thirdly, in the Profile Name box, type the name you want to use for your new profile.

4. After that, on the Auto Account Setup page for the Add Account Wizard, fill in Your Name, E-mail Address, and Password, and then click Next.

5. Finally, choose Finish and you’ll find the new profile name you added listed on the General tab in the Mail dialog box.

3. Repair your outlook data files

Outlook stores all your email messages, meetings and events, contacts, and tasks in data files. These files occasionally might become corrupted.

Similarly, you can run the Inbox Repair Tool (scanpst.exe) to scan your Outlook data files and repair errors.

4. Run the /resetnavpane command to fix Outlook App Not Opening

The navigation pane is the leftmost pane in Outlook where you’ll find your folder list and the icons to move between Mail, Calendar, People, and Tasks.

Running the /resetnavpane command removes all customizations to the navigation pane.

5. Also check if the outlook is running in the compatibility mode

Compatibility mode is designed to help a program run on an older operating system. If Outlook is running in compatibility mode, you can turn that off and see if it fixes the problem.