these times I have 2 independt microsoft accounts. First is "*** Email address is removed for privacy ***" and "*** Email address is removed for privacy ***". I want to affiliate these 2 accounts together. I want to have the "...prostejinej.cz" account like the primary one. And the "...outlook.com" like an alias. 

Can you help me how to proceed this action?

Thanks in advance

Tomas T