NameID Format Generation

[Cantor, Scott]

> I have found that when using the legacy (v2 style) settings that SPs who once
> received subject-NameIds didn't get them in v3 if there is no NameId
> requested in their metadata.

The triggers for format selection are essentially identical to V2. What you were doing that no longer works is trying to use denial rules to limit the possible choices to exclude transient usage.
 
-- Scott