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Jet Web Portal - 503 The Service is Unavailable



Error encountered attempting to browse to Jet Web Portal Site.

Service Unavailable

HTTP Error 503. The service is unavailable



Open Internet Information Services (IIS) Manager

Select the Application Pools

In the Application Pools frame, click on the Jet Web Portal

**Note that the Status shows Stopped**

Right-click on it and select Advanced Settings…

Set Enable 32-bit Applications to False

Click OK button

Right-click on the Jet Web Portal and select Start

Allow for a few seconds, then try refreshing the Jet Web Portal site once again from your browser.

Anyone with whom the access has been granted should be able to browse to the site from within a supported web browser.


Recently, with the release of Windows 10 Version 1709 (Fall Creators Update) or Windows Server 2016 Version 1709, after the upgrade, some web applications do not start, and they return the above HTTP 503 error message. (Article ID: 4050891 - Last Review: Oct 17, 2017)

More details can be found in this Microsoft Support article.



To resolve this problem, manually delete the symbolic links that are created by Windows Update.

To do this, follow these steps.

Note Symbolic links can be deleted the same as regular files.

  1. Open a Windows PowerShell window by using the Run as administrator option.
  2. Run the following commands:
    Stop-Service -Force WAS
    Remove-Item -Recurse -Force C:\inetpub\temp\appPools\*
    Start-Service W3SVC
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