How can I change Keychain permissions without being physically present?
If you have ssh &amp; admin access to the server you could use the security command line tool to manipulate keychain items. It can add &amp; delete passwords, identities and certificates, look at the security man page for the details.

I haven't tried but it looks like sudo security dump-keychain -i &lt;keychain&gt; may do what you want.

I suppose that you could use the security tool from the terminal via Screen Sharing if you didn't have ssh access.