I opened a TAC case on this and found that the ACE only supports basic authentication.  I spoke with the sharepoint admin and found out that it was using NTLM.  After doing some more thinking on this we decided to change our probes to expect a 401 co...

Has anyone figure this out?  I am tring to get healthchecks/probes setup in this same fashion.  I have 2 servers with 1 IP but have many sites.  I want to probe each side and ensure I get a 200 code.  I also have to provide credentials to the site.  ...