Hello
Because it looks that it is not possible to change the symbol for the thousands separator (digit grouping symbol) in ArcGIS Online and Portal for ArcGIS i would like to ask if there is a way to disable by default the "Use 1000 Separator" for all pop-up and table views.
See also:
Default number format (thousands separator, decimal marker) and date format (country specific)
https://community.esri.com/ideas/12134
Cheers