Can't you create a segmentation that says "If account owner is _____" add them here? I've also done it with their SFDC ID as well as email address for the owner. I swear I've done ...
Another idea if you want to ensure your team is following up on emails is set a trigger campaign that for every interaction (I recommend clicks) you can create a task in Salesforce...
Are you creating this in SFDC as well? If you are, just create it there first and it will automatically be mapped over to Marketo as a multi-select. Otherwise here are the definiti...
I'd guess that the link has been disabled if they're marked as rejected in Webex but you should follow up with them to ensure that will occur. Or wait until the webinar starts and ...