1. I have an Open Data site that is fetching data from ArcGIS Server through ArcGIS Online. If I configure ArcGIS Server to use ArcGIS Web Adaptor, will the map and images services already added to ArcGIS Online open data groups automatically pick the new service url or i have to re-import everything. e.g. from http://domain:6080/rest/service/myimageservice to https://domain.com/rest/services/myimageservice
2. I am not able to add a custom favicon to my Open Data site. Is there a set of criteria that the favicon needs to meet? I'm using a png image 16*16.