HI Shirley,
Hoping this helps, we are able to add any activity code time off related or not prior to publishing schedules. My team will go in and make sure all team meetings, trainings, and 1on1's are added on schedules prior to being published for agents to see them. Not sure why you are getting an error stating that it is not allowed as we have never seen that issue. I wonder if it might be access related?
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Pablo Flores
Security Service Federal Credit Union
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