Do you have a claims based website and do you get the following error when accessing the federation metadata of the application?
Figure 1: HTTP Error 500.0 – Internal Server Error
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To try to resolve this error, do the following:
- Check if the builtin group IIS_IUSRS has Read and Execute NTFS permissions (Scope: This Folder, Subfolders and Files) on the folder of the web application
- Check if the builtin group IIS_IUSRS has the user right "Impersonate A Client After Authentication" on the server running the claims based application
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After configuring this, execute GPUPDATE /FORCE and IISRESET
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Also see: ERROR 500.0 | Internal Server Error | AuthenticateRequest | StaticFile | 0x80070542
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Cheers,
Jorge
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