You can add followup actions to message log actions and static method call actions.
Open the action in the Object Manager
panel.
Under the General
section, choose the Followup Actions
tab.
The Followup Actions
tab page opens.
You can add a new action or add an existing action to the message log action.
Add a New Action
Choose Add New Action
.
In the Object Creation
dialog box that appears create a new action.
Add an Existing Action
Choose Add Existing Action
.
In the Object Query
dialog box that appears, select the action and choose Select
.
The selected action is added as a followup action.
Activate the action.
Save the action.