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Hi till yesterday I was able to login to claim based web apps in my sharepoint 2010 server. but today they are giving below mentioned error! even though classic mode auth web apps are running fine.
Nor it allow to activate /deactivate any fature to a site collection under claims based web app with same error in event log:
error message in event viewer:
Log Name: Application
Source: Microsoft-SharePoint Products-SharePoint Foundation
Date: 10/8/2010 1:30:59 PM
Event ID: 8311
Task Category: Topology
An operation failed because the following certificate has validation errors:\n\nSubject Name: CN=SharePoint Security Token Service, OU=SharePoint, O=Microsoft, C=US\nIssuer Name: CN=SharePoint Root Authority, OU=SharePoint, O=Microsoft, C=US\nThumbprint: 85F230FF68A8107A14667844D6741A6C2199C60E\n\nErrors:\n\n
UntrustedRoot: A certificate chain processed
When you create a new web application in Sharepoint 2010 and you select "Claims based authentication" for the Authentication option, the "Trusted Identity provider" box is greyed out.
There are some blogs etc. about how you add a custom STS or something like ADFS, but isn't the built-in Sharepoint STS an identity provider?
What part does the Sharepoint STS play in a web application? Is it a different type of STS?
Are Sharepoint claims enabled applications different to WIF claims enabled applications?
I am new in SharePoint development using VS2010.
I am looking for examples for developing Workflow from inside Vs2010 on list or on Site.