You log on to a contained database as a contained database user in Microsoft SQL Server 2014 Service Pack 1 (SP1). However, when you right-click the contained database in Object Explorer and then click Properties, you receive the following error messages:
The module being executed is not trusted. Either the owner of the database needs to be granted authenticate permission or the module needs to be digitally signed. (Microsoft SQL Server Error: 15562)
Login failed for user '<contuser>' (Microsoft SQL Server, Error: 18456)
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.