Brug af Klassisk Outlook i Windows til administration af personlige mails, kalender og kontakter
Hello
On her phone, can you have her check her sent box, and see if that email currently sits in there?
On your side, how did you check? Did you check using email app, or using web UI? If you use app, can you make sure you check on www.outlook.com via web browser instead, and see if the email is there? If not, check Spam, Archive and Deleted items, see if it might be there? In addition, go to Outlook.com Settings on the web, and in the Mail app, check Rules, Forwarding, Sweep, if you see anything you didn't set up, remove.
Let me know..