"reset the service account password to encrypt for Exchange 2000"???

[spooties]

Hi there,

I am having the problem described in

http://support.microsoft.com/default.aspx?scid=kb;en-us;271410.

For the resolution, it is saying :

"In Exchange System Manager, locate the administrative group, and then reset the service account password to encrypt it for the Exchange 2000 server."

I have located and turned on administrative groups, but how do I reset the service account password to encrypt it for Exchange 2000?

Thanks a lot,

Jason