SanfordWhiteman

If you’re deduping on id (which is implied by including an id column) then empty email and phone won’t cause a failure for that row. So can you please elaborate on the failure reasons and provide a repro case?

Yes, if the SFDC User (e.g. via Sharing Rules) doesn’t have access to any objects in SFDC. Therefore, you can’t do this with the same SFDC User in both instances. Needs to be separate users. Note I would not recommend completely hiding all Leads & Contacts from the new User, instead exposing a smal...

Are we able to have same email sender in more than 1 Marketo instance?Of course. You use different DKIM selectors and different branded envelope domains. (Note the SPF record only matters for your envelope domain, the From: domain’s SPF record is not checked.)

It's been 10 years, is there still not fix for this bug?Unfortunately, not through the UI. But you can delete the token using the API when this happens.

...the Wait Step, and assuming you're including it to allow the CRM step time to finish😀You don’t need it for this purpose either, because Sync to SFDC runs synchronously. You don’t need to wait for it, any more than you need to wait for Change Data Value. Now if you need to wait for a subsequent s...

Pre-Fill isn’t used by Known Visitor HTML. Completely different feature.

Ensure your test record has non-empty First Name, Last Name, and Email. These are prerequisites for the feature. Other than that, you just need a tracked link or a preexisting associated session (obviously).

This is the built-in Known Visitor HTML feature (in Form Editor » Setup » If Known Visitor, show Custom HTML). Your web team doesn't need to do anything.

What (please be precise) is the Wait step for?

Hi @SanfordWhiteman , then what should be the best way to run this campaign.Like Udit said. I was pointing out that even if you didn’t need to include all the Random Samples in one place, what you were trying could never fit your needs, since you’re changing the overall population before sampling.