Recording every call, message (and in my office - thing you said at your desk) is mostly used for conflict resolution - when counterparties disagree you go to the tapes and see what was said. From there my word is my bond, it is done.
Or how about slack, that live in an alternate reality where outlook calndar doesn't exist?
What does that even mean? I doubt you can forbid the usage of personal messaging apps except in very exceptional cases (like a court room).
On the other hand: Using personal messaging apps for work related information is a no-go anyway because of confidentiality agreements basically everyone signs.
- Ban ANY use of your personal chats / device at work (eg. your wife texts you to bring milk on the way home)
- Ban WORK communication (eg. My colleague don't understand recent commit I've made)
So the web really isn't explaining how things enforced or what is being done. I do know of some industries where you put your personal phone when entering specific locations or having stickers on cameras) but here I didn't fully understood the scope.
Now the idea is all banking related stuff is done on approved devices and clients so you can deal with retention(more like deletion) and loss.
And no personal chat clients too. If you're low enough on the pole, you don't even get to keep your personal devices with you.
You can forbid your employees to use non official apps to send work related messages for privacy, compliance, security and other reasons.
It's just an article from a company about their industry, companies do that all the time for brand recognition, building trust (showing expertise in their domain), and educating potential customers about why they might need this sort of product (lead generation).
“Take” sounds too threatening.