QuickBooks Error 350 takes place due to either the banking server not responding as per your query or the QuickBooks server won't fetching with bank sever. In both cases, you will encounter QuickBooks online error 350 and unable to download banking transactions. We have thoroughly expressed our wisdom to eliminate QuickBooks error 350, and if you have any more doubt, you can (844)-932-1139 to avail yourself the quick support from our expert end.