Hello Jason! Yes you can do this. You need to keep the excel file on the pre-defined shared folder. Then on Tableau desktop, change the path of the excel data connection to this shared folder. The path has to be a proper UNC path. While publishing to server, do not select the "Include External Files". From Tableau Server when the extract refresh will be run, the tableau server will always point to this excel file on the shared folder (through the UNC path) and refresh the extract.