There are quirks and annoyances in Dynamics GP like all systems but some design decisions are more puzzling than others. One thing in purchasing that has always bugged me is that there are no user defined fields available on a purchase order. I know that I can now use Extender to add fields but most other transactions and cards have at least 2 user defined fields.
Then to make it more bizarre, receiving transactions are blessed with 35 user defined fields including 20 dates. Who needed 20 user defined dates on a receiving transaction? And how long does it take them to receive items?
