One of the issues we run into when requesting new certificates from ADCS is the dreaded 401 Unauthorized issue with Certsrv.

Symptom

  1. Type the URL for your Certificate Server
    http://server/certsrv
  2. You are prompted for administrator credentials
  3. You enter said credentials
  4. You are again prompted for administrator credentials
  5. You enter said credentials
  6. You are presented with a 401 Unauthorized error message
  7. You bang your head against your desk in frustration

Cause

The IIS server is not negotiating your credentials correctly.

Solution

http://blog.armgasys.com/?p=250