title: Is it possible to create a QBXML VendorMod request for Vendors with a matching Custom Field (DataExt) value?
body: <p>I'm attempting to update QuickBooks Vendor records using QBXML and Web Connector.</p>
  
  <p>From the system in which I'm generating the QBXML requests, I don't have ready access to the QuickBooks Vendor <code>ListID</code>, but I do have access to a unique identifier that we store in a custom field (<code>DataExt</code>) in the QuickBooks Vendor record.  Is it possible to create a <code>VendorMod</code> request that will update the Vendor record(s) that have this unique value in a custom field?</p>
  
  <p>I've scoured the <a href="https://developer-static.intuit.com/qbsdk-current/common/newosr/index.html" rel="nofollow">OSR</a> and the <a href="https://developer-static.intuit.com/qbSDK-current/doc/PDF/QBSDK_ProGuide.pdf" rel="nofollow">SDK guide</a> to no avail.</p>
  
  <p>And if the answer is no, then what's the best way to proceed?  Start with a <code>VendorQuery</code> request, sort through the Vendors in the response, then create a <code>VendorMod</code> request using the ListID of the matching Vendor?</p>