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• In the GUI, select the server in the left hand pane and click on the "ISAPI Filters" and in the right.
  • Now remove any Shibboleth related filters.  For a default install this will be called Shibboleth and be for executable C:\opt\shibboleth-sp\lib64\shibboleth\isapi_shib.dll
• In the GUI, select the server in the left hand pane and click on the "Handler Mappings" and in the Right.  
  • Now remove any Shibboleth related ISAPI
  mappings.  These may be distinguished by a path of ".sso" and by a Handler of "IsapiModule"
  • handler.  For a default install this will be called something like AboMapperCustom-8689 and be for executable C:\opt\shibboleth-sp\lib64\shibboleth\isapi_shib.dll

• In the GUI, select the server in the left hand pane and click on the "ISAPI and CGI Restrictions" in the Right.  

  • Now remove any Shibboleth related restriction.  For a default install this will be called something like Shibboleth Web Service Extension and be for executable C:\opt\shibboleth-sp\lib64\shibboleth\isapi_shib.dll

• Edit %SYSTEMROOT%\System32\InetSrv\config\applicationHost.config and look for the words "shib" or "shib_isapi".  The following is the new definition

  Code Block
  <globalModules> ... <add name="ShibNative" image="C:\opt\shibboleth-sp\lib64\shibboleth\iis7_shib.dll" /> </globalModules> ... <modules> ... <add name="ShibNative" /> </modules>

  and should be left along.
  
  In particular the string isapi_shib.dll indicates that the removal is incomplete.  Such entries should be removed,

• As well as the applicationHost.config file, you may need to inspect the web.config files for the sites and their sub folders.

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