There seems to be an issue with SPO 2013 sites in that code which would allow us to perform Remote Authentication in SharePoint Online Using Claims-Based Authentication is no longer working.
We have programs that worked fine before the upgrade. These are standard .net desktop applications written in Visual Studio 2012 access SPO through the client-side object model. We can connect with no problem to a SP 2010 site, but if we try and connect to a SP 2013 site we get the following error:
Error
error has occurred on the server.
Troubleshoot
issues with Microsoft SharePoint Foundation.
Correlation ID:
8cd4169c-ca59-6092-8167-5a6e3ec0ac66
Date and Time: 4/30/2013 6:22:37
AM
This issue only happens after a site is upgraded, but even after the upgrade we have no problems connecting to SP 2010 site collections. The problem only occurs with upgraded or new SP 2013 site collections.
Of note is that when you click on the "Go back to site" it always takes you to the default site collection, not the site collection you were trying to access. Even though the window shows the correct URL.
So, something has changed and the change will mean that every customer that wrote a client side program to access SPO online using claims-based- authentication will be unable to use the same code against the sites after upgrading to SP 2013. Claims based authentication is what we were all told to use for future compatibility.
I think a lot of people are fussing with this problem. Its easy to test.
Open Visual Studio 2012. Get the sample program from Microsoft that shows how to connect to a SPO Site collection. Try it against a SP 2010 site collection. It works. Now try it against a SP 2013 site collection. It fails.
Savin
Cheers, Savin Smith