Exact. Lookup field type isn't available on activity records.
What are you looking to do ?
You can "enable" activities on any custom object, which gives you the ability to associate an activity record with a custom object record (Optional features -> Allow activities).
Exact. Lookup field type isn't available on activity records.
What are you looking to do ?
You can "enable" activities on any custom object, which gives you the ability to associate an activity record with a custom object record (Optional features -> Allow activities).