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I've recently upgraded to SharePoint 2013 from 2010.

I'm getting a repeated 401 unauthorized when trying to update a List. This issue also occurs when trying to change permissions.

The 401 is being returned from http://{webapp domain name}/{site collection}/{site}/_vti_bin/client.svc/ProcessQuery

This occurs on all of the sites as part of the web application.

We're running Kerberos on that site. SharePoint version 15.0.4617.1000

I have a support case logged with MS at the moment, but I feel like I'm going around in circles with them. Any help would be greatly appreciated.

  • You might need to you try deactivate the “HTTP Activation” feature of .NET 3.5 and .NET 4.5 and re-enabled one by one (1st .NET 3.5, 2nd .NET 4.5 ) them after deactivation then do the IISReset – Supermode Jul 4 '14 at 0:24
  • just ran through that. with http activation completely disabled updating lists failed immediately (no auth prompt) - so I think we're on the right track here. I re-enabled http acivation in 3.5 and then 4.5 and it's gone back to 401ing. – db_dave Jul 4 '14 at 0:58
  • did you do the iisrest afterwards? – Supermode Jul 4 '14 at 1:01
  • yes I did. I'm giving it a reboot now to see if that helps at all. – db_dave Jul 4 '14 at 1:06
  • same thing sorry. here's the script I ran remove-windowsfeature NET-HTTP-Activation remove-windowsfeature NET-WCF-HTTP-Activation45 add-windowsfeature NET-HTTP-Activation add-windowsfeature NET-WCF-HTTP-Activation45 add-windowsfeature AS-HTTP-Activation iisreset – db_dave Jul 4 '14 at 1:23
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  1. You might need to you try deactivate the “HTTP Activation” feature of .NET 3.5 and .NET 4.5 and re-enabled one by one (1st .NET 3.5, 2nd .NET 4.5 ) them after deactivation then do the IISReset

  2. Re-enable Form Authentication

Link:http://social.technet.microsoft.com/Forums/sharepoint/en-US/ff191f26-a467-4103-a09a-6f0fe2012d50/vtibinclientsvcprocessquery-post-401?forum=sharepointadmin

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