We are unfortunately stuck on SQL Server 2008 for our SDE databases for a few more months. I know that Desktop starting at 10.4 doesn't support this version of SQL Server. However we are interested in upgrading our Portal site to 10.5 (w/ corresponding federated Server). We're already at 10.4.1 for Portal and have no issues consuming services (from a 10.4.1 ArcServer) that are ultimately coming from 2008 SQL Server databases.
I'm hoping for a little clarification about whether going to 10.5 Portal+Server will result in any issues relating to the support deprecation of SQL Server 2008.