Microsoft has just released the following KB Article:
System Center 2012 Configuration Manager Mac client enrollment fails if passwords contain special characters
Symptoms
The Configuration Manager CMEnroll tool fails on a Mac client computer with the following error:
Error recieved: Server Connection failed. HTTP Response code is 400 and reason is Bad request.
http://support.microsoft.com/kb/2839072
I’ve updated the list of KB Articles for ConfigMgr 2012 accordingly.