Specifically, they would offer Teams for free in a bundle with Office (which basically every company buys anyway). Every manager could strike Slack from their expenses, replace it with Teams and claim great success.
Microsoft has since been forced to change their tactics [2-3], but the damage is done.
[1] https://overcast.fm/+AAQ2lFdljEs/40:32 [2] https://www.ft.com/content/be838956-7038-4179-8a1c-851b83048... [3] https://www.nytimes.com/2024/06/25/business/european-union-m...