I am trying to register a SQL DB with my server, but getting the following error:
The connection property set was missing a required property or the property value was unrecognized. Connection was attempted with an older version of SQL Server client communications software that is not compatible with the SQL Server database server.
This is similar to Connection was attempted with an older version of SQL Server client communications, but I am pretty sure I have the same versions. Here are the SQL Server applications installed:
ArcGIS for Desktop 10.3
ArcGIS for Server 10.3
SQL Server 2012