We were trying few test migration and built our SharePoint server 2016 on top of SQL 2016 and windows 2016 . We did want to try SSRS connection after the test migration from SharePoint 2010 to SharePoint 2016 .
We were having issue with the data connection , even if we created new .rsds file and tried to connect to a DB which was hosted on SQL 2008 R2 we were receiving the error as below
"A connection was successfully established with the server, but then an error occurred during the login process. (provider: SSL Provider, error: 0 - An existing connection was forcibly closed by the remote host.)"
I spent long hours trying to figure out if it was SharePoint issue or SSRS configuration issue even I did double check if Office online server was causing the issue , finally was able to back track the issue was with the SQL component on Windows 2016 OS . As per the new standard the SQl client hosted on Windows 2016 would not allow TLS1.0 communication and the minimum it supports in TLS1.2 .
Found a article which was put accross by Microsoft regarding the same and by installing a patch on SQL 2008 R2 and adding the necessary registry key , SQL as well as Sharepoint was able to communicate to legacy version of SQL instance .
Link --> https://blogs.msdn.microsoft.com/sqlreleaseservices/tls-1-2-support-for-sql-server-2008-2008-r2-2012-and-2014/
