Troubleshooting Cisco Secure ACS on Windows - Q&A clarification.

In a Cisco Press publication "Troubleshooting Cisco Secure ACS on Windows" (http://www.ciscopress.com/articles/article.asp?p=474238&seqNum=6&rl=1), I read the following question:
How can I disable the users' option to change the password by using Telnet to access the router?
It has an answer describing certain details. However, the question itself is not clear to me. Could someone explain them a little more clearly?
Thanks.

At the command prompt on a router its possible to start a password change request over TACACS to the ACS server.
I think you enter an empty password twice as I recall.
This can cause problems if users change their password on a "slave" ACS which is then replicated to from a "master" thus setting the password back to its pre-changed value.

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Hi Jesse,
Thasts a great answer and Soution.
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Supported Operating System
Cisco Secure ACS for Windows Servers 3.3 supports the Windows operating systems listed below. Both the operating system and the service pack must be English-language versions.
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To Whomever Can Assist,
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OFFLINE
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Troubleshooting Cisco Secure ACS on Windows - Q&A clarification.

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