How to run (SaRA) Fiddler Trace


Fiddler is a third-party (non-Microsoft) web debugging proxy that logs all HTTP(S) traffic between a user's computer and the Internet. It includes a powerful, event-based scripting subsystem (Fiddler Tracer) and can be extended by using any Microsoft .NET language.

More information


The Fiddler Trace scenario in SaRA can only be run with the assistance of Microsoft Support.

To install and run the Fiddler Trace scenario in the Microsoft Support and Recovery Assistant (SaRA), follow these steps:

  1. Go to the SaRA Assisted Setup.

  2. When prompted by your browser, select Run.

  3. In the "Do you want to install this application?" window, select Install.

    Select to install Microsoft Support and Recovery Assistant.

  4. Wait for the download to finish.

    Microsoft Support and Recovery Assistant installation status.

  5. Read the Microsoft Services Agreement, then at the bottom of the window, select I agree.

    Select to agree with Microsoft Services Agreement.

  6. Enter the passcode provided by Microsoft Support in the box, and then select Next.

    Enter the passcode in the Microsoft Support and Recovery Assistant for Microsoft 365 page.

  7. In the Security Warning window, select Yes and then select Next.

    The Security warning window that occurs when ensuring system requirements are met.

  8. Select Start to capture the log.


    The log may contain personal information. Review the logs before you send them to Microsoft. You can decide whether or not to send the logs.

    Select Start to capture a diagnostic log of your problem.

  9. Reproduce the issue that you are having, and then return to the Recovery Assistant and select Stop. The Recover Assistant stops recording, creates the log files, and then restarts your applications.

    Reproduce the issue and create log files.

  10. To help secure the network capture, enter a password. Note the password so that you can provide it to support technicians if they request it. When finished, select Next.

    Enter a password to secure the network capture.

  11. If you are satisfied with the information that the Recovery Assistant has collected, select Next. If you want to discard the information and repeat this procedure to collect new information, select Start over.

    Logging collection by the Recovery Assistant is complete.

  12. On the Thanks for collecting diagnostic logs page, follow the instructions to upload the log files and then select Next.

    Steps to upload log files.


    • Selecting the "Microsoft Support Site" link opens the file transfer workspace.
    • Selecting the "here" link opens the folder that holds the recorded log files.
    • The log files in Windows are available as %localappdata%\Temp\<random characters>\Fiddler_*.saz.
  13. On the Microsoft Support Secure File Exchange website, select Add files to upload the log files.

    Add the log files in the file transfer page.