Involved in the biosynthesis of decaprenylphosphoryl arabinose (DPA) a precursor for arabinan synthesis in mycobacterial cell wall biosynthesis. Could be involved in the dephosphorylation of decaprenylphosphoryl-5-phosphoribose (DPPR) to decaprenyl-phospho-ribose (DPR) (By similarity). Cell wall biogenesis; cell wall polysaccharide biosynthesis. Belongs to the PA-phosphatase related phosphoesterase family. Truncated N-terminus.