Event ID - 611

Event Id611
SourceMicrosoft-Windows-ADFS
DescriptionA required configuration section of web.config was missing: '%1' Section: %1 The Federation Service cannot start until this condition is corrected. User Action Add the required web.config section.
Event Information According to Microsoft :

Cause :

This event is logged when a required configuration section of web.config was missing

Resolution :

Review missing fields in the web.config file

This problem can occur when one or more required sections (logonserver and FederationServerConfiguration) in the web.config file are missing. To correct this problem, do one of the following:

To perform this procedure, you must be a member of the local Administrators group, or you must have been delegated the appropriate authority.

Add the required section back to the web.config file.

To check web.config file for missing sections:
  1. In Notepad or another text editor, open the web.config file that is in %systemdrive%\windows\systemdata\adfs\sts\on the federation server.
  2. Search for logonserver and FederationServerConfiguration tags.
  3. Check that a value is present and that it is correct.
If a backup file exists for the web.config file (web.config.bak), rename the file to web.config, and see if that corrects the problem.

If the previous steps do not work, consider reinstalling Active Directory Federation Services (AD FS) using the existing trust policy.

Verify :

Verify that you can access the Active Directory Federation Services (AD FS)-enabled application from a client browser and that the resource can be accessed.
Reference LinksEvent ID 611 from Source Microsoft-Windows-ADFS

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