How to refresh/synchronize dataGrid after executeMicroflowInBackground?
I am not sure if it will work but we have the follow pattern:
1. On your overview page, put a MF timer widget, which is triggered every so many seconds (5 sec in ours case).
2. The MF triggered checks if there is a refresh object available and if so, refreshes the main object, refreshing the entire page:
If you do not have a page entity, you could let the microflow close the page and reopen it. Although it might give a less smooth user experience, I expect it should do the trick.