Issue
When working on an event program, Marketo Engage users are unable to select a webinar provider in the event partner selection.
Environment
Event program
Webinar provider (ON24, Zoom, Cvent)
Solution
The members need to be removed before setting up the event partner.
You can remove members from a program by changing their status to "Not in Program".
Root Cause
Marketo does not allow selecting an event partner in a Marketo event program with members.