Domain.live.com – multiple domains, single account

I've had a look on the forums and can't seem to find the same situation I am needing to set up.

Currently, I have multiple domains (lets say company.com, companyname.com and companyname.co.uk). Is there any way to set up a unified account where all emails are delivered into a single outlook.com mailbox without forwarding. I would prefer not to have separate accounts under the same log in, but all end up in a single inbox ideall. I'm hoping to move them all to the domain.live.com system, but don't want to start the process without being sure!

Thanks,

Tim