We have a new deployment of SharePoint 2013. 100% of the users are external (no end-user computers are in the domain). We have two ISS Sites (a MySite IIS site, and Business ISS Site on same server). The Bueiness IIS site consists of primary site, and 5 subsites each on a separate database. All users login using domain\username and access to everything.
The problem, SharePoint is constantly asking for authentication? Moving between sub-sites, between any business site and my-sites, or from my-sites back to business sites.... We have half a dozen testers, and they all complain of the same issue of constant requests for authentication. I have tried saving my creds, am still prompted again, but saving creds even if it did work is a bad practice.
Is there anything that can be done with either SharePoint or IIS that can alleviate this problem?