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.
1. URL changes needs to be corrected and will not be automatic. Open the Item Details page of service in question in ArcGIS Online>Settings Tab>Scroll down to "Map Image Layer Settings" section>Paste updated URL>Save changes.
From Data manager page in open data page, update the indexing.
2.Where is the image hosted? Is it externally accessible URL for image? Can you share favicon link?