While trying to configure Management Reporter 2012 on a brand new install of GP 2015 I received the following error:
“Couldn’t retrieve the list of available databases: The connection attempt failed.”
Configuration is SQL 2012 on Server 2012 R2, GP 2015 on Server 2012 R2.
Solution: Install Dexterity Shared Components 12 from the install disc for GP2013 R2.
I found the answer here:
Thank you to Richard Markham.