How to Disable SSO
You can disable the entire Single Sign-On system by using either the MMC Snap-In or the command line.
There will be a short delay for all Single Sign-On Servers to be disabled, as they poll the SSO database for the latest global information.
To disable Enterprise Single Sign-On using the MMC Snap-In
On the Start menu, click All Programs, click Microsoft Enterprise Single Sign-On, and then click SSO Administration.
In the scope pane of the ENTSSO MMC Snap-In, expand the Enterprise Single Sign-On node.
Right-click System, and then click Disable.
To disable Enterprise Single Sign-On using the command line
On the Start menu, click Run, and then type cmd.
At the command line prompt, go to the Enterprise Single Sign-On installation directory. The default installation directory is <drive>:\Program Files\Common Files\Enterprise Single Sign-On.
Type ssomanage –disablesso.
Note
On a system that supports User Account Control (UAC), you may need to run the tool with Administrative privileges.