*Peoplepicker checknames respects the peoplepicker-searchadforests property after SP2. This was not the case prior to SP2.
After SP2 you will not be able to lookup users in an external domain that is in a one-way trust relationship with the sharepoint local domain.
Prior to SP2 the Peoplepicker Checknames function did not respect the peoplepicker-searchadforests property. Users could be resolved from other domains, even if there was only a one way trust. Checknames used LSAT and LDAP to search and display a match prior to build 12.0000.6520.5000 as described in KB976396: http://kbalertz.com/Feedback.aspx?kbNumber=976396 (http://kbalertz.com/Feedback.aspx?kbNumber=976396)*
IS THIS REALLY TRUE?