When adding a new data connection in Server Explorer in VS 2010 (with Azure SDK), I can successfully \"Test Connection\" but when adding it I get this alert box:
I've got the error "unknown property PrimaryFilePath" when tried to connect to Azure DB from VS 2015, but succeeded when connected from VS 2019.
The default collation for character data in SQL Azure databases is SQL_Latin1_General_CP1_CI_AS. The server and database level collations are not configurable in SQL Azure. However, you can use a collation of your choice at the column and expression level.
I believe your problem is described here in this blog: Working With Collations In SQL Azure.
This blog article will show you how.
I came across the same issue using SSDT for VS 2015. I changed the data provider to ".NET Framework Data Provider for OLE DB" on the Change data Source window and it worked.