On premise CRM org, two business units. A system admin from one business unit can use the Send Direct Email option for a contact successfully. A system admin from the other business unit can not. The error received is:
The contact selected does have a valid Primary Email address, and the Bulk Emails field is set to 'Allow'.
Details of the error log show:
<Message>Object address not found on party or party is marked as non-emailable</Message>
Not sure what I'm missing.