What is Contained Database in SQL Server

• Contained database is a new feature launched in SQL Server 2011.
• This model clearly separates the database application from the management of SQL Server. 
• Users can connect to the database without authenticating a login at the Database Engine level. 
• Applications within contained databases can be isolated from other databases from the instance of SQL Server, on which they reside, simplifying development and management. 

 A Video Tutorial and a Presentation on Contained Databases:

Reporting Services and SharePoint - Context Expired Exception

Problem: 

When trying to open a report or even looking at a data source, SharePoint would throw an exception: "Report Server has encountered a SharePoint error. ---> Microsoft.SharePoint.SPException: The context has expired and can no longer be used. " 

Solution:

I tried the usual remedy steps such as IISRESET and rebooting the server. I then tried to repair the RS Add-In and even run the SharePoint Configuration Wizard. Nothing was working, but I did notice in the logs that the timestamps were not the right time. 

After several other actions, I decided to fix the clock on the server to have the correct time. Wow ... This resolved the context issue and everything started working. The clock was so much different than any client machine that the security context was assumed to be expired.