Hello!
If I’m putting one or even several labels onto a mail to categorize them I can see all of the labels. However when my coworker, who’s sitting in another country, opens those mails she’s only able to see a fraction of the labels sometimes. So the problem is that not all of the labels I stick onto an e-mail are also display to my coworker? Anybody had this problem before? 
I suspect that is because the labels are eg: only locally setup in each eM Client installation and are not generally cloud label synchronized.
Most labels are usually individual to each user.