I am having the same problem with my feature service map. The public can't open it despite making it public. Any help?
Hi Baffour,
If your users are being prompted to login, check to ensure that the web map and all of the layers in the map have been shared with everyone. If this is the case, and you are sharing a web map via your organizations url, ensure that anonymous access is enabled, or modify the ult to come from www.arcgis.com.
-Kelly