I don't know how SSMS works to do that, but I have the same issues when I'm not connected to my corporate network.

The only way I know the types of authentication to use is through a reinstall.

>how do I do that? In SSMC?
>
>But wait a minute. I can connect in SSMC but not from VFP
>
>also my laptop let's me log in away from the offcie. don't I have some local credentials?