Error Description

The Windows Remote Management (WinRM) error "The WinRM client cannot process the request because the delivery retry parameters are invalid" typically occurs when the WinRM configuration settings for delivery retries are corrupted, misconfigured, or set to values that violate internal Windows system limits.

WinRM uses specific parameters to manage how it retries failed connections. If a script, a third-party management tool, or a group policy object updates these parameters incorrectly (for example, setting the maximum retry attempts lower than allowed or setting interval times to invalid values), the WinRM service will refuse to process any incoming or outgoing remote requests.

Step-by-Step Fixes

Method 1: Reset WinRM to Default Configuration

The quickest and most effective way to resolve this issue is to reset the WinRM configuration back to its system defaults. This clears any invalid retry parameters.

1. Click on the Start Menu or press the Windows Key.
2. Type cmd or PowerShell into the search bar.
3. Right-click on Command Prompt or Windows PowerShell and select Run as administrator.
4. In the console window, type the following command and press Enter:

   winrm quickconfig

5. If the system prompts you to make changes or restart the service, type y (Yes) and press Enter.
6. If the command states that WinRM is already running, force a configuration reset by running:

   winrm reset

Method 2: Manually Correct the Delivery Retry Parameters via Command Prompt

If a complete reset is not ideal for your environment, you can manually force the standard values for the delivery retry parameters using the WinRM utility tool.

1. Open the Command Prompt as an Administrator.
2. Execute the following command to update the configuration to standard system values:

   winrm set winrm/config @{MaxEnvelopeSizekb="800"; MaxTimeoutms="60000"}

3. Next, specifically target the client delivery parameters by running:

   winrm set winrm/config/client @{NetworkDelayms="5000"}

4. Restart the WinRM service to apply these changes by executing:

   net stop winrm && net start winrm

Method 3: Fix via the Windows Registry Editor

If the command-line tools fail to update the settings due to the error itself, you can fix the parameters directly within the Windows Registry.

1. Press Windows Key + R on your keyboard to open the Run dialog box.
2. Type regedit and press Enter to open the Registry Editor.
3. In the left sidebar, navigate to the following path: HKEY LOCAL MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Client
4. Look for keys or DWORD values related to Retry or Delivery parameters in the right pane.
5. If you notice any customized or unusual values, right-click them and select Delete, or modify them to match standard default integers.
6. Navigate to the service configuration key: HKEY LOCAL MACHINE\SYSTEM\CurrentControlSet\Services\WinRM
7. Ensure the Start DWORD value is set to 2 (Automatic) or 3 (Manual).
8. Close the Registry Editor and restart your computer.

Method 4: Check and Correct Group Policy Settings

Sometimes invalid parameters are pushed continuously by a local or domain Group Policy Object (GPO).

1. Press Windows Key + R, type gpedit.msc, and press Enter to open the Local Group Policy Editor.
2. In the left pane, navigate to: Computer Configuration -> Administrative Templates -> Windows Components -> Windows Remote Management (WinRM) -> WinRM Client
3. Look for policies named Specify network delay or any custom delivery policy settings in the right pane.
4. Double-click on any modified policy and change its status to Not Configured or set valid numerical values.
5. Click Apply and then OK.
6. Open an Administrative Command Prompt and force a policy update by running:

   gpupdate /force