> Why is this exactly newsworthy? Any communication through official channels is the property of the employer anyway.
Pretty clear one of the major things they're going for here is detecting "jobsite troublemakers", ie employees who are upset with job conditions/agitating for improvements/discussing salaries/etc, which is given specific legal protection. It is explicitly legal and protected for employees to discuss labor conditions, organizing, or salaries regardless of whether you do it "on company property" or "on company chat". Just because the company owns it doesn't mean you have no legal rights - just like a company can dismiss you for no reason but they can't dismiss you for any reason.
They are wrapping it up with "think of the children" justifications like "employees who are discussing salary might be considering leaving and they might take nefarious action if they do so" but that's the core of the situation here - these are tools to detect and fight against legally-protected activities by employees.
> Workplace collusion: The workplace collusion classifier detects messages referencing secretive actions such as concealing information or covering instances of a private conversation, interaction, or information.
> "The leavers classifier detects messages that explicitly express intent to leave the organization, which is an early signal that may put the organization at risk of malicious or inadvertent data exfiltration upon departure"
Hypothetically, do you think it would be a good idea for Microsoft to build a classifier and provide managers with a list of potential "religiously devout", eg based on correlated work/away periods, language patterns, etc? Sure, it's a legally protected classification, but there's an elevated risk of extremist activity, which surely presents a business risk, right? So why not?