Only one person can use online banking at time.
If more than one person uses your company file, it is in multi-user mode. Before you can use online banking, you need to get exclusive use of the feature. “Exclusive use” means that you are the only person who can bank online until you release the feature. You need exclusive use even if you are the only person using the company file right now.
How do I get exclusive use of online banking?
To do this task
Go to the Banking menu, click Online Banking, and then click Acquire Exclusive Use.
What if I'm in the middle of editing a transaction?
QuickBooks must close all open windows to give you exclusive use of online banking. If you are in the middle of editing a transaction, your changes to it are not saved. (Transactions you have changed and saved are not affected.)
When you have exclusive use, you can find your transaction again and make your changes.
How do I release exclusive use when I'm done?
If just one person uses your company file, it is in single-user mode. You already have exclusive use of online banking and do not need to do anything more.