Sometime when we try to access central administration and certain tabs like operation and Application management we face issues. Certain probably error messages are:
“Error message 401.2.:Unauthorized: Logon failed due to server configuration. ” .
You can resolve these type of error by:
The cool thing about the Central Administration Web Application is you can stop the Central Administration Service and SharePoint will DE provision the Web App and when you start the service you will have a brand new Web App.. The CA is just a GUI for doing all of the jobs instead of using the command line for everything. But you do not lose any functionality by not having one…
To stop Central Administration service: psconfig.exe -cmd adminvs –unprovision
To Start the Central Administration Service:psconfig.exe -cmd adminvs -provision -port 9999 -windowsauthprovider onlyusentlm
Just replace 9999 with the port you want to have Central Administration run… Note this will update all of your servers with the new link to the new Central Administration location..
Hope I was able to describe the content based on my knowledge and learning.
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Hope this help