If you use Outlook.com (maybe you still call it Hotmail), you can avoid the difficulties of sending around e-mail attachments when you want to distribute or collaborate on Office documents. Instead, send a link to the documents you have stored on OneDrive.
- Compose your message
- Click Insert, and then click Share from OneDrive.
- Pick the document you want to share, click Open, and then finish sending your mail.
When you receive Office documents as attachments in Outlook.com, you can open them right there in your browser, without downloading them.