Hello,
Thank you for your question and reaching out.
As per your Query,
There are many reasons behind Outlook closing abruptly, such as corrupted Outlook files or system files, too many add-ins, etc.
The first thing we need to Do is to Update the App and Windows,
Now we need to check Weather the outlook is working fine with the Safe mode, considering the impact of some add ins, I Wiil suggest you to try to start outlook in safe mode
(win+R>type: outlook /safe). and check
Check any faulty add-in enabled for Office applications:
You may use application safe for each Office application to open for example open Run (press Windows key + R), type winword /safe, excel /safe for Word and Excel respectively. If it works fine, disable the add-ins using File > Options > Add-ins for each applications
Incompatible printer driver:
Change the default computer printer to XPS Document Writer using Control Panel and verify the status.
Security software installed on the computer conflicting with Office applications:
Enable Clean-boot then try to use Office application to find if any Non-Microsoft software is causing the issue.
https://support.microsoft.com/en-us/topic/how-to-perform-a-clean-boot-in-windows-da2f9573-6eec-00ad-2f8a-a97a1807f3dd
Note: enable Normal Start-up after troubleshooting.
Corrupt Windows User Profile:
Create a new Windows Administrator user account and check if it prevents Office application crash.
I will also recommend you to execute some commands
sfc /scannow
DISM /Online /Cleanup-Image /RestoreHealth
https://answers.microsoft.com/en-us/windows/forum/all/system-file-check-sfc-scan-and-repair-system-files/bc609315-da1f-4775-812c-695b60477a93
And see if it helps,
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