There's a couple of buttons, bottom-right of the main window, controlling the Zoom. One is for the current viewport, the other for all viewports (the right one of the two). Click/hold that one and select the upper of the 2 flyout options,then click the button. That should center the scene in all the viewports. You may need to zoom in to get to the origin.
Or just create an object (a small box will do), move it to the origin by right-clicking the spinners at the bottom of the Max window, then repeat the earlier suggestion but select the lower of the 2 flyout options (zoom extents all selected ). Then delete that temporary object.
Max 2016 (SP1/EXT1)
Win7Pro x64 (SP1). i5-3570K @ 4.4GHz, 8Gb Ram, DX11.
nVidia GTX760 (2GB) (Driver 430.86).