This is weird. I see the activity of the value being added in the Activity Log
I am using the Customer ID as the link, it shows they have data, but I am not seeing a Custom Objects data tab in the people viewer.
Did you set the CO to be visible in the lead UI? That’s a setting in Admin » Marketo Custom Objects » <your object>.
Sorry, yes I had it hidden. Checking now.
I clicked show, but still don't see it.
You should still see the Custom Objects tab. Tell us about this Customer ID field you used as the Link field. It’s a lead (person) field?
@kenmckown please check your thread and supply updates.