@ArielI  RE: A significant number of users accessing the program at that specific time can be a reason for this slowdown. The server has limitations on how many requests it can handle concurrently....If numerous users are conducting tasks such as running reports, uploading files, or performing database queries, this can significantly strain the server's performance.

You're opening admitting that your servers are overtaxed and can't keep up with your users in the middle of the business day? Wow!

The more I read about QuickBooks Online, the worse it gets. Now you're admitting your servers are lacking, which I guess is obvious given how generally terrible QuickBooks performance is.

But hey, at least your users get to do their books "online" which is oh so very cool. It's almost as nifty as TV from outer space.