Wow, these peopleare just beating around the bush, they know exactly what you are asking for but I'm sure they are not allowed to tell you how.
A more respectful approach of an answer from them would something in the lines of: "That's a default behavior, you can't change it by using any option in Outlook or MSN, we can't recommend you one solution because of our policies. You will probably have
to rely in third party software to achieve what you want".
My answer is:
This is somewhat advanced stuff but I suggest you use third party software, something like some local DNS proxy that allows you to use wildcards, so you can do something like "127.0.0.1 *.msn.com" (the IP can be for any website you want, like your homepage).
You can look for some host file "enhancer" that also allows you to use wildcards. The problem with the previous methods is that the IP may change, so you could look for software that lets you redirect to an URL like outlook.com
You can also look for an add-on like a redirector for your browser, or there may be something made specifically for your issue.
I'm not giving you any specific program hoping not getting my answer deleted.