Hi there, @TAX15.
I'm here to help you fix the incorrect password error when sending the invoices.
There are many reasons why you've got this error message even though the credentials are correct. I've listed the following scenarios below:
- A damaged QuickBooks installation.
- The email preference being set incorrectly.
- Domain admin was blocked.
- Account security settings from your email provider.
You can begin with updating the QuickBooks Desktop program to clear any data issues that block the action of sending an invoice through email. Here's how:
- Go to the Help menu and select Update QuickBooks Desktop.
- On the Options tab, click Mark All, then Save.
- Go to the Update Now tab and mark the Reset Update box, then select Get Updates.
Once the update is complete, restart the program and test if you can now send the invoice using your web email. If you're still not able to do that, you can check out Step 2 in this article: Fix webmail password issues in QuickBooks Desktop.
You're welcome to share any updates after performing the initial troubleshooting steps that I've mentioned above. If there's anything else can do to help, please don't hesitate to let me know. Take care.
