Please enable the option to not use extension numbers starting with "0". Perhaps an option to "do not auto-assign extensions from xxx to yyy" Having extension start with 0 or 00, etc., is confusing to all involved - clients and their callers. The only workaround I have found is to import 100 "dummy" extensions (000-099), which has its own obvious headaches. In a 4-digit & 5-digit environment, the issues become exacerbated. Thanks.