Outlook crashing mid-way frustrates and wastes the precious time of the day. It usually crashes because of a large mailbox, add-in conflicts, an outdated version, or corrupted PST/OST files. What should be done when something like this happens? 

Try any of these fixes to resolve Outlook freezing or crashing issues:

Disable Add-ins

• Open the Outlook app.  

• Go to File > Options. 

• Click Add-ins. 

• Choose COM Add-ins > Go. 

• Uncheck all add-ins, and click OK.

• Restart Outlook. 

Install the Latest Updates 

• On Outlook, go to File > Office Account.

• Click “Update Options.” 

• Choose “Update Now.” 

• Once the update is installed, restart Outlook. 

If you need to update your Windows, follow the instructions below: 

• On your PC, press the Windows + I keys to open Settings. 

• Select “Windows Update.”

• Click on “Check for updates.”

• Install any available updates.

• Once the installation is finished, restart your PC.

Repair Office 

• Press the Windows + R keys. 

• Type the code: appwiz.cpl in the given field and press Enter.

• Find Microsoft 365 or Microsoft Office in the list.

• Right-click on it and select “Change.”

• Click on “Quick Repair.” If it does not work, choose “Online Repair.” 

• Click on Repair. 

• Wait for it to complete, then restart the computer. 

Create a New Outlook Profile

If no fixes work, then the last resort left is creating a fresh Outlook profile: 

• Close the Outlook application. 

• Press the Windows button. 

• Search for and open the Control Panel. 

• Search Microsoft Outlook, then select Show Profiles from the Mail Setup dialog box.

• Click on Add to create a new profile if the current one is corrupted.

• Enter a new profile name, then click on the “OK” button.

• Add your account details and complete the setup.

• Select “Always use this profile,” then click on the new profile.

• Open Outlook and test it.

Source:- Solve Outlook Keeps Freezing or Crashing Issue