interesting... that is what I read. my assumption is that in denoting the time as UTC (zulu) in the request, the service performs the appropriate conversions. I tested sending UTC looking for an order last modified at 11:57am (eastern), searching first for an order lastmodified after 11:56am (eastern) .ToUniversal() and it returned that record. then searched lasmodified after 11:58 (eastern) .ToUniversal() and it did not return.