Why is a HAR File Needed?

A HAR file is required by support to analyze certain errors more precisely. It contains technical information about the communication between Outlook and the services used and can help identify the cause of a problem. In the new Outlook, it can be created using the developer tools. The developer tools can be enabled via a PowerShell command.

Instructions: How Exactly Do I Create the HAR File?

Note: These instructions refer to the new Outlook. Before starting, make sure that the new Outlook is installed and completely closed.

1. First, open Windows PowerShell locally on your computer.

   

2. Then enter the following PowerShell command: olk.exe -devtools
   
    

3. Prepare the DevTool for recording the HAR file:
   
   1 → Select the Network tab.
   2 → Stop network logging and clear the network log (this ensures that no unnecessary data besides the actual error logging is included in the HAR file).
    

4. In Outlook, select the email for which the error should be logged, then re-enable network logging.
   
    
5. Reproduce the error you want to capture in Outlook.
    
6. Stop network logging after reproducing the error:
   
    
7. To save the recorded activity in a HAR file, click the "Download" icon in the editing bar. Then save the file in HAR file (*.har) format.