Helping people with computers... one answer at a time.
Switching between Hotmail accounts requires logging out completely from one and signing into another. Other methods might not give you the results you are looking for.
"It happens that Hotmail also gives you the ability to switch back and forth between accounts. Click on options in the upper right; more options, sending and receiving email from other accounts. You can add your alternate email address and it will then appear in the drop-down when you click the arrow next to your name in the upper right."
In this excerpt from Answercast #25, I look at the way Hotmail manages accounts and why you must log out of one before using another.
I want to clarify that this will, in all likelihood, not do what people really want. It is not switching back and forth between accounts.
What that functionality does is it transfers the email; it loads the email from those remote accounts into your current Hotmail current. So you're still in your current Hotmail account, but you are looking at the email that has been received from... has been sucked up from... the other email accounts that you have specified.
That's not the same as actually logging out from one account and logging into the other: which is what most people want to do when they switch back and forth between accounts.
Next from Answercast #25 – How should I backup my computer before upgrading to Windows 7?