Users of email via a browser, Thunderbird, Kmail, Mutt, Apple Mail or whatever probably won't be interested in this. To be fair, neither (probably) will users of MS Outlook, but there you go.
MS is going to roll out a new version of their email client, Outlook. I've used Outlook for years, currently on the MS 365 version. It's OK. Does some things well, others badly, some so so, much like many other clients I've tried. On Outlook with MS 365, the new Outlook is being offered for a try. You can toggle between old and new. Generally, your email sits on the server of whoever provides the service, whether it's an ISP, a company like MS, or even email from whoever hosts your domain. For instance, MS provides my hotmail account, so my email sits on an MS Server or servers somewhere. I use a client so I have local copies as well.
But, with the new Outlook one thing is completely different. MS wants to sync any non-MS accounts you access via Outlook to the MS Cloud. As their online help makes clear -
Quote:
Syncing your account to the Microsoft Cloud means that a copy of your email, calendar, and contacts will be synchronized between your email provider and Microsoft data centers
The help implies that this "can" now be done by the user, and that it's an enhancement: a big opportunity etc. In fact, it "must" be done to use the new Outlook. Obviously, the old Outlook's days are numbered, so soon enough all non-MS email accessed through Outlook will be copied onto their servers.
Not sure I'm happy with this. OK, so I rely on Google to store copies of my email safely if I use GMAIL. Same thing with a handful of other accounts that I've yet to get rid of. But do I want Microsoft to hold yet another copy somewhere on the Cloud?