Extend Win Auth Webapp to use Forms Auth

Question

Is it possible to extend an existing web application (configured to use classic mode authentication) to use claims authentication? When I try to extend the web app I don't see a option to pick authentication mode in CA...

If the above is not possible, can the existing web app be changed to both claims and win auth? Also the current site uses basic authentication over SSL.

Any kind of help will be appreciated.

Thanks!

Answer 1

Claim/classic is controlled by a property UseClaimsAuthentication at the SPWebApplication, so it's not possible to change it by zone.

You can change an existing Classic webapp to run claims (and claims allows you to use windows as one of the authentication providers).

See technet article Migrate from classic-mode to claims-based authentication