The science fiction reality
Link your Hotmail accounts
If you have a Windows Live ID (The e-mail address and password that you use to sign in to Windows Live programs and services such as Windows Live Hotmail and Windows Live Messenger; Microsoft services such as Xbox) that you use for work and one that you use at home, you can link them.
To link an account
If you have multiple Hotmail accounts, you can now manage these more easily. You can link them together so that you can switch between them (by clicking on your profile picture in the top right hand corner of page).
Enter a Hotmail address into the 'Add an e-mail account' screen and Hotmail will link your accounts together so it's faster to switch between them.
To add an address
It's easy to add and use an additional address with Windows Live Hotmail. Complete a simple verification process, sign in to your other account and follow the instructions in that e-mail.