Microsoft has announced that a total of 1.1 million consoles were shipped in quarter two of the fiscal year ending March 31, 2015. This means that 1.1 million combined Xbox 360 and Xbox One units were shipped to retailers from April 1 until June 1. It is unclear how many units were sold through to customers. This number seems pretty low considering it's the total shipments of two consoles over a three month period, but we don't yet have the full sales data on PlayStation 4 and Wii U during the same time period for comparison.
We know that the Kinect-free Xbox One model that launched just after quarter two has boosted sales, and June was a stronger month for Xbox One than May, so it's likely that the quarter three numbers will be substantially improved.