Ensure you have already connected e-manageONE to your Company Quickbooks File (See Map QuickBooks File to e-manage). You will also want to ensure the Quickbooks Integration Files have been installed if e-manageONE was installed previous to Quickbooks otherwise the files automatically download with the Installation of the e-manageONE Software.
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You MUST have QuickBooks open when you try to send data over. The first time you try to send data, QuickBooks will ask you to allow e-manage to connect. Allow and move forward. See here for making the initial connection to Quickbooks and see here for Importing Chart of Accounts, Customers and/or Vendors for the first time.
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