I saw same message from last week. The message is

I'm here to help share some information about error 323 and help you get back up and running, kanako.

In QuickBooks Online, QuickBooks Error 323 is a banking code that indicates you have added the same bank account twice or connected two accounts with similar names or account numbers (last 4 digits).

If you've added the account twice, you'll need to disconnect one of them. Here's how:

Here's how:

1. Click Transactions in the left panel and select the Banking sub-tab.
2. Select one of the accounts you want to disconnect, and then click its Edit icon, then Edit account info.
3. In the Account window, select Disconnect this account on save.
4. Hit Save and Close.
   

However, if you've connected two accounts with similar names or account numbers, you can follow the step above to disconnect it, sign in to your bank's website and rename one of the accounts from there.  After that, you can follow the steps below to link them again in QuickBooks.

1. From the left menu, click Transactions and select Banking.
2. On the Banking page, select Add Account.
3. In the Search field, enter the bank's URL (example: http://www.chase.com).
4. Select your bank. If you see multiple options, you may have to repeat these steps to find the correct one.
5. Enter your bank login on your bank's website, then select Continue.

Once connected and transactions are starting to download, I recommend editing, assigning, and categorizing your transactions. Also, you can match them to the existing entries in the software. Just go to the For Review tab from the Banking menu. Doing so will help you ensure the accuracy of your financial records.

Additionally, may I asked which bank are you having a problem with? I want to make sure I've got you covered.

This should keep you moving today, kanako. I'm only a post away if you have any questions about this error or anything else you need in QuickBooks. I'll be glad to share and provide further assistance whenever you need one. Have a wonderful day! Take care.

Hi, kanako.

Hope you're doing great. I wanted to see how everything is going about the error 323 you had yesterday. Was it resolved? Do you need any additional help or clarification? If you do, just let me know. I'd be happy to help you at anytime.

Looking forward to your reply. Have a pleasant day ahead!