Just a quick tip for everyone that is struggling to configure SharePoint Server 2013 PerformancePoint to connect to a SQL Analysis Services 2012 or 2014 cube.
After a new SharePoint Server 2013 installation, I have tried to create a new connection to my Analysis Services cube through the SharePoint Dashboard Designer, but no matter what, the Database option always shows up as empty and I can select my Analysis Services database.
In the Windows server log event I could find the following message:
The data source provider for data sources of type ‘ADOMD.NET’ is not registered. Please contact an administrator.
PerformancePoint Services error code 10115.
The reason you would receive this error message, believe it or not, is because even if you are using SQL Server 2012 or newer, and SharePoint Server 2013, it will try to load the SQL Server 2008 version of the ADMD.NET dll.
If you install the SQL Server 2008 R2 ADMD.NET component, that you can download from the following location: https://www.microsoft.com/en-us/download/details.aspx?id=16978 , and restart IIS you will fix this issue and will be able to successfully connect to your SQL Server 2012/2014 Analysis Services database.
Hope this helps.