As Pat and anonymous commented, you can see who's online in the direct messages section. I went ahead and started a direct message with each of my team members and then didn't say anything so they stayed in my direct messages area. We also have Groups set up where it's easy to message and see who's online and who's not. I can't figure out how to remove people from groups though so employees that have left are still listed which drives me crazy.
As Pat and anonymous commented, you can see who's online in the direct messages section. I went ahead and started a direct message with each of my team members and then didn't say anything so they stayed in my direct messages area. We also have Groups set up where it's easy to message and see who's online and who's not. I can't figure out how to remove people from groups though so employees that have left are still listed which drives me crazy.