How to upload a file to mark outstanding transactions?

Hi there

I have a bank reconciliation of 9,000 transactions, of which 750 of them are outstanding. I have already identified the outstanding transactions in an excel workpaper.  

Do you know if there is any way to upload or mark the 750 outstanding transactions with an upload like there was in SAGE 500? 

Right now I find an option to click yes to all and then unselect the outstanding transactions, but it will take forever to unselect the 750 outstanding transactions. 

Thanks in advance for your help