CRM 2011, ADFS 2, WIndows 2008, SQL 2012, Multi Tenant, Customised, 2 Domains - Get random but frequent 404 File or Directory Not Found.
We have exactly the same issue as you described earlier except we do have a full URL already. We are on UR6 and I'm sure the first thing we will be told is to UR to 13 or 14. Now due to the nature of our account this just is not possible at the moment. This is government \ lack of funding issue.
We have a complicated setup that is in pilot phase, i.e. 3 tenants on different app boxes and 2 web servers linked to a DB box and ADFS 2 box. The users are in a different domain than that of the servers, hence credentials are not validated against AD on setup! We inherited the design that I believe is a not a Microsoft supported architecture.
We get intermittent 404 on internal CRM pages, the resolution for the Users is to refresh the page. I think this is a token issue.
Basically without upgrading to UR 13 or 14 is there a solution to this? ADFS 404 error is all over the web in different guises and no one seems to have a definitive answer, even latest UR has not cured this in some instances.
Microsoft support might be possible but their first request will be to UR to latest. As I say the decisions are out of our hands as far as expense goes. Thanks for any forthcoming advice.