Globally Accessible CA Certificates
CA certificates can be made accessible to all users connecting from the same
computer. This is possible by manually copying the desired CA certificate files
.crt file name extension) from the user account
Application Data\SSH\CACertificates directory into the into
%ALLUSERSPROFILE%\Application Data\SSH\CACertificates directory (for example
C:\Documents and Settings\All Users\Application Data\SSH\CACertificates on an English-language Windows NT
The globally accessible CA certificates can be seen on the
Certificates page of the Settings dialog.
Note: This does not work on Windows 9x platforms.