Hi there, paul83.
Welcome back to the QuickBooks Community. I appreciate you for performing some steps to resolve the issue of being unable to send your emails via Outlook. I'll ensure to share an update about the problem and route you to the right person to assist you further on this so you can get back on track.
The issue about Outlook crashing when sending invoices emails is currently tagged as an ongoing issue. Our Product engineers are now working to resolve this as soon as possible.
For now, you can try running both QuickBooks and MS Outlook as admin as a workaround.
Here's how:
1. Close QuickBooks Desktop. Then, open the Windows Start menu.
3. Type "QuickBooks" into the search. Then right-click the QuickBooks icon and select Open file location.
4. In the folder, right-click the QuickBooks.exe file and select Properties.
5. Choose the Compatibility tab. Then, select to check the Run this program as Administrator option.
7. Click Apply and then OK.
Then, I also recommend contacting our QuickBooks Desktop Support Team, so they can add you to our notification list. This will help our engineers determine the number of affected users. You'll also receive an update through email once this has been resolved.
Lastly, you may refer to this article to view possible reasons why Outlook is missing as one of your options and how to fix this: Fix Outlook is missing in send forms preferences.
Please let me know if you have any other questions while sending emails from QuickBooks. I'll be right here to help, paul83. Have a good one!
