Hydrolyzes the pyrophosphate bond of UDP-2,3-diacylglucosamine to form 2,3-diacylglucosamine 1-phosphate (lipid X) and UMP by catalyzing the attack of water at the alpha-P atom. Involved in the biosynthesis of lipid A, a phosphorylated glycolipid that anchors the lipooligosaccharide (LOS) to the outer membrane of the cell. H2O + UDP-2,3-diacyl-alpha-D-glucosamine = 2,3-diacyl-alpha-D-glucosaminyl 1-phosphate + 2 H(+) + UMP Binds 2 divalent metal cations. Glycolipid biosynthesis; lipid IV(A) biosynthesis. Belongs to the metallophosphoesterase superfamily.