Sage X3

Does anyone here have any idea how to validate a PO Invoice using a webservice, or other similar method?

Hi there, I'm trying to use POSTMAN to query if an INVOICE exists by date. What DATE format should I use? I'm trying: xx.xx.xx.xxx:xxxx/.../YSINVOICEV eq '2017-05-24', but I get the response: "$message": "X3 engine error: Type incompatibility…