I am trying to publish a feature service from ArcMap 10.4.1 and I need to Register the Map with SQL Server (sde)which is installed in a machine outside of our network. I have all authentications , instance and database name but I am getting this error:
"Failed to connect the specified server. Do you want to continue? Failure to access the DBMS server"
Can you please let me know is it possible to connect to a SQL server database which is installed out the network? and why I am getting this error?
How you troubleshoot an issue like this depends on one's level of IT comfort/expertise and how much access one has to install software on the machine.
This really isn't an ArcGIS issue, it is a SQL Server issue. I suggest you read the Steps to troubleshoot SQL connectivity issues MSDN blog post. The blog post is a bit dated, but the overall message and steps are still valid.