Why do Reports show username-only instead of Domain\Username?

Reports typically display a filtered user with the syntax Domain\Username.  However, when using Proxy Mode withoutAuto-Login enabled, a login entry of username will be authenticated by iPrism against the domain iPrism is joined to by default. If authentication succeeds the username appears in the report exactly as entered by the user, without a pre-pended domain. Essentially, you can interpret username in Proxy Mode without Auto-Login as Joined-Domain\Username.