Merge Microsoft Account to Organizational Account

Hello,

We have an Azure AD that contains our Microsoft Account ( firstname.lastname@mycompany.com ).

I want to configure AzureAD Connect with this Azure AD.

The problem is that the name that we use for our Microsoft Account is the same as the UPN of our on-premise AD.

What will append after the synchronisation ? Are they merging together ?

I try to be clear but it's difficult to explain :-)

Il the meantime i found this post : "http://feedback.azure.com/forums/169401-azure-active-directory/suggestions/5214614-merge-office365-and-live-accounts-that-use-the-sam"

And the solution that they provide is that we have to rename our Microsoft Account...

thanks for your input !