The scheduled refresh in the Service side is a cloud Service, which we can't control it manually for now. If your datasource have configured a getwat, you could control the gateway. Therefore you could stop the refresh in many ways. I restart the On-premises Gateway to stop the refresh in my test of on-demand refresh. You can try it for the scheduled refresh.
Community Support Team _ Daniel He If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
This is helpful, when I am using my personal gateway :).
I have an enterprise gateway, for two reasons, I cannot restart the Gateway.
1. It is on the server, managed by admins and takes longer to get approvals and get hold of them.
2. We are using same gateway for our direct queries, and the reports are shared with more than 1000 users. So, they might see the errors in that few minutes, if anyone is accessing the reports at the same time when gateway is restarting. It's again a long route, to communite the outage and restart the gateway.