Thanks for chiming into this discussion, Jeff. Allow me to provide some details regarding the maximum number of users who can utilize the Spreadsheet Sync in QuickBooks Online (QBO) Advanced.

In QBO Advanced, only admin users are able to access and manage the Spreadsheet Sync feature. 

To get started, please see this article for the procedures: What's Spreadsheet Sync?

Additionally, we've included the most commonly asked questions about the new Spreadsheet Sync feature in QBO. Please refer to this link for the answers: Spreadsheet Sync FAQ.

If you have any further queries about the Spreadsheet Sync, please feel free to ask them in this post. I'll make sure to respond to you right away to continue assisting you. I hope you have a good day!