I am trying to connect a client's bank account to QB and this message always comes up.Try again in a few hours. (7500)Will it eventually work, is this a known issue?

Let me check our records and help with your banking question, Aaron. 

Can you also tell us the name of the client's bank? This is for me to check if there are any open investigations about an error 7500 when adding a bank.

In the meantime, let's try a couple of troubleshooting steps to check if the error is caused by a browser-issue. Here's how:

Start by using an incognito or private browsing session. Follow these keyboard shortcuts depending on the browser that you're using:

• CTRL + Shift + N for Chrome
• CTRL + SHIFT + P for Mozilla
• Go to File, then click New Private Window if you're using Safari.

Second, log back in to the client's account and proceed to adding the account. Then, check if you're to connect it successfully. 

Make sure to switch back to the original or regular browsing session if the bank is already connected. Then, proceed to deleting the temporary saved files and stored cache in your browser. 

This article shares the steps on how to do it: Delete or disable cache and temporary internet files in your web browser.

You'll also want to switch to any of these supported browsers to further isolate the issue:

• Google Chrome.
• Mozilla Firefox. 
• Microsoft Edge.
• Safari 11 or newer (Mac only).

Please keep us posted if you have other questions. We're just around the corner to help you out.