[sparticvs]

If you just want microsoft's whois, do this

whois microsoft.com.

The . at the end tells the whois server, relative to root, no wildcard matching.

[lcedp]

    % whois microsoft.com.
    No whois server is known for this kind of object.

[joeblau]

    whois 'domain microsoft.com'

[nakkiel]

Depends on the software you're using. Try:

    % whois \=microsoft.com