When attempting to use the Marketo Sales Insight actions drop-down list, to perform an action for a specific contact in Salesforce, the drop-down does not appear in the MSI section.
Check to see if the specific contacts this is occurring on have been recently converted. If they have, then the actions drop down will not appear until the contact has synced back down to Marketo.
Who This Solution Applies To
Customers with Sales Insight in Salesforce