Hello and welcome here.

Thanks for your first edit.
I had to redo it, primarily for the following reasons.

Adding a node with just a name is useless, the database won’t know what to do with it and it won’t show up on the map.
Capgemini is a company, right → so we tag it as office=company.

The building already has an address.  So, any point within the building inherits the same address, you don’t need to repeat it manually on every point.  Leave it blank, it will be all right.

I fixed it.