Let me help you in fixing it, jo4444.
You'll want to make sure that both QuickBooks Desktop for Mac and the server are updated. There are two ways in updating it, the manual or in-product. Please check this link for the detailed steps: Update QuickBooks for Mac to the latest release.
Also, QuickBooks Desktop for Mac requires Microsoft Outlook 2016 or later. You'll want to update it too to avoid issues like this.
The Preferences is in the QuickBooks menu. You can run verify and rebuild data in QuickBooks Desktop for Mac to see if the reason why you can't see it is due to a damaged file.
If this error continues, please don't hesitate to reach out to our Support Team for further assistance.
- Go to this link: https://help.quickbooks.intuit.com/en_US/contact
- Select QuickBooks Mac Desktop. Click Search for something else and enter "Outlook".
- Tap Search. Scroll down to the bottom section and click Start a Message.
Comment again if you need anything else. Wishing you all the best!
