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Problem: Unable to unfederate an ArcGIS GIS Server machine from a Portal for ArcGIS site

Description

Unfederating an ArcGIS GIS Server machine from a Portal for ArcGIS site does not remove the server from the Portal site and returns the following error:

Error:   
Unable to update the authentication tier of the server prior to unregistering it from the portal. The server has not been changed or unregistered.

Cause

The following are possible causes for this issue:

  • The ArcGIS GIS Server URL or the admin URL, which is registered with Portal for ArcGIS, is invalid.
  • The ArcGIS GIS Server security settings changed, causing the ArcGIS GIS Server to no longer be federated with Portal for ArcGIS.

Solution or Workaround

The following are possible solutions for unfederating ArcGIS GIS Server from Portal for ArcGIS:

  • Remove the federated ArcGIS GIS Server from Portal for ArcGIS
    The following Portal for ArcGIS document describes how to manually unfederate ArcGIS GIS Server from Portal for ArcGIS:
    Removing an ArcGIS Server site from your portal
  • Change the authentication tier
  1. Log in to ArcGIS Server Administrator Directory as an administrator.
  2. Click Security > Config > Update.
  3. Change the Authentication tier from ARCGIS_PORTAL to GIS_SERVER.
  4. Click Update.
  5. Stop the ArcGIS Server and Portal for ArcGIS Windows services.
    Note:
    Ensure that the ArcSOC.exe processes are stopped via the Windows Task Manager. To open the Task Manager, click Start > Run, type task manager and press Enter. The following Microsoft document provides a detailed description on how to use the Windows Task Manager: How to use and troubleshoot issues with Windows Task Manager
  6. In the Microsoft Services console, restart the ArcGIS Server and Portal for ArcGIS Windows services.
    Note:
    To start the Microsoft Services console, Click Start > Run, type services.msc, and press Enter. This Microsoft document provides a detailed description of Services and the Services Microsoft Management Console (MMC) snap-in: Services
    
  7. Log in to Portal for ArcGIS as an Administrator.
  8. Navigate to My Organization > Edit Settings > Servers.
  9. Log in to the ArcGIS Portal Directory using Access the ArcGIS Portal Directory via the following URL:
    https://webadaptor.domain.com/arcgis/portaladmin
    Note:
    This URL provides certain administrative functions not available in the portal website. This document provides a detailed description of the ArcGIS Portal Directory: About the ArcGIS Portal Directory.
  10. Click Federation > Servers > Federated Server.
  11. Click Unfederate.

Related Information