This is the error that appears when I try to refresh data. I have been struggling with this issue for a few weeks. Researching in internet but with no luck. My sharepoint site is 2013 and SQL Server ...
Scenario: We have a server farm that consists of (2) back-end servers, (2) web front-ends that are accessed via the internal network, and (2) web front-ends that are accessed from outside the network ...