> this claims Edge sends all visited URL to Bing? Yes. So if you instead of attachments of large files in email send an URL such as https://acme.pri/?id=cafe-b

> this claims Edge sends all visited URL to Bing? Yes. So if you instead of attachments of large files in email send an URL such as https://acme.pri/?id=cafe-babe-deadbeeff00d https://acme.pri/?id=cafe-babe-deadbeeff00d, which is not secured by any other method than obscurity, then Edge will submit it to Bing, which indexes it and then the content is available if you can come up with some keywords that match. It is fairly well known in Norway, due to having been in the national news earlier this spring, but I have no reason to think it doesn't apply universally.