You should tag with source=microsoft/buildingFootprints then.

Was this import discussed anywhere? It is clearly not properly manually reviewed. I did a random spot check.

https://www.openstreetmap.org/way/1366360594
https://www.openstreetmap.org/way/1366360179
https://www.openstreetmap.org/way/1366359998
https://www.openstreetmap.org/way/1366360532
https://www.openstreetmap.org/way/1366360319
https://www.openstreetmap.org/way/1366360650
https://www.openstreetmap.org/way/1366360345
https://www.openstreetmap.org/way/1366360154
https://www.openstreetmap.org/way/1366359805
