Managing external identities to enable secure access for partners, customers, and other non-employees
@Peter Weiss Thank you for reaching out to us, As I understand you are looking for GA details for this feature "Before sending the token (preview)" which is in public preview right now.
Did discuss with my engineering team on this, the update which I have, currently there is no plan to GA this feature.
However we are working to include these features in External ID.
If you have any feedback regarding this feature, feel free to share it on https://feedback.azure.com/d365community which is closely monitored by our product team.
Please remember to "Accept Answer" if answer helped, so that others in the community facing similar issues can easily find the solution.