New labeling capabilities in Office apps helps you protect sensitive information

Are security labels not working on Outlook for Mac? can someone verifiy So i was planning to implement this in our organization, using the new unified labelling client. Made a nice presentation to show this to management, and during the presentation, I send a restricted e-mail to one of my colleagues, containing: do not copy, forward, print etc. the default mail specific AIP label option with 'apply do not forward' (I published the default label from the admin portal) My colleague uses a Macbook, with a recent office for Mac. 16.22.1(190220) and no AIP or Unified labelling client. At first he was prompted for credentials as expected, but when he got access to the mail, he could copy text from the mail and forward the mail. Restrictions were visible on the mac, but also showed that everything was allowed. When forwarding to someone else with a windows machine, restrictions were applied as advertised, and the receiver could only reply. As i remember RMS from 2008r2 the restrictions are set on the client application. So i'm guessing this is a bug and a serious security risk for companies which use this in production.