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I thought most of those installations went down on the Titanic...
Anything that is unrelated to elephants is irrelephant Anonymous - The problem with quotes on the internet is that you can never tell if they're genuine Winston Churchill, 1944 - Never argue with a fool. Onlookers may not be able to tell the difference. Mark Twain
Keep in mind that it may upload any website credentials to a MS server.
That's how all browsers manage to sync anything across devices.
Just last evening, I had a neighbor call me to go "fix" her login credentials (she's a Chrome user). Long story short, after I've fixed it on her laptop, Chrome, on her phone, also started working again without us changing anything.
If you are paranoid, make it a habit to disable your network connection whenever you do not actually do work on the internet, but e.g. edit documents. Every time you start Word with a network connection available, a report goes to a logging service; I do not know what the log report contains. Similar with other software: There are lots of them sending reports.
If you open a local encrypted file, it is safest to do it with the network disabled; you never know who picks up you keystroke. In principle, all your keystrokes may be buffered while you are offline, and the whole batch sent when you go online, but today, 95+ % of all users are online all the time, so I guess the keyloggers assume that they can send the log as soon as a small buffer has filled up, with no provisions for delayed sending. I have never seem any indication of delayed transmission.