QB Enterprise 20. We have about 15 active users, and EVERYONE that has been upgraded to office 2016 or 2019 has isues with emailing with outlook from QB. Is there a fix?

Hello, @dbkite. Thanks for the details. 

Currently, we received reports about QuickBooks unable to send emails to Outlook in which our product engineers are diligently working for a fix.

In the meantime, I recommend contacting our Customer Support Team so they can add you to the list of affected users. Once added, you'll receive an email notification once an update is available.

Here's how to reach them:

1. Go to Help.
2. Click QuickBooks Desktop Help.
3. Pick Contact Us.
4. Enter a brief description of your issue, then select Continue.
5. Choose to receive a callback. 

Additionally, I want you to get the most out of QuickBooks for your business. You can check some articles that are designed to help you get acclimated with the software. They can be accessed at the following link: QuickBooks Tutorials.

Let me know if you need additional help. I'm always here to provide further assistance with anything QuickBooks related. Have a great day!