Companies need to consider how they will use the data from Salesforce in their accounting software. Most companies will want the sales order process in Salesforce to trigger the quote or invoice process in the accounting software, so be sure that the invoicing workflow meets your company’s needs, especially for things like automatic sales tax calculations and similar. Larger companies will also want to evaluate whether the software meets compliance rules, such as Sarbanes-Oxley and GAAP, among others. For the most part, however, as long as there is an integration available (native or otherwise), the main consideration is whether the accounting software meets a company’s needs overall.