Hello, PinkLightning.

I appreciate you in taking your precious time in resolving the missing Outlook issue. Aside from the steps you've outlined in your reply, I'll lay down other solutions in fixing it and ensure you'll be able to set it up in QuickBooks. 

What version of QuickBooks is installed in your desktop? Depending on your version, it may not be compatible with your current Outlook version. 

To quote the system requirements for software compatibility on the current supported versions of QuickBooks Desktop (2020, 2021, 2022): 

• Office 2019 (Compatible with R3 and later).
• Office 2016 (including Outlook 2016) both on 32 and 64-bit.
• Office 2010 SP2, Office 2013 and 365 (including Outlook 2010 and Outlook 2013) both on 32 and 64-bit.
• Email estimates, invoices, and other forms with Microsoft Outlook 2010-2016, Microsoft Outlook with Office 365, Gmail, Yahoo Mail and Outlook.com, other SMTP-supporting email clients.
• Note: Office 365 is only supported when it is locally installed, not the web version.

Previous unsupported versions have different software compatibilities for emailing. 

If already checked the software compatibility, have you tried doing the steps outlined in the article posted by veraY? It lists the potentials steps and solutions to help you fix the missing Outlook option. 

For convenience, I'll post the article here: Fix Outlook is missing in send forms preferences. 

Another user, Goodgold1987, also listed some of their solutions in thread. If the steps in the article didn't quite work for you, we can follow their solutions: Permalink. 

If none of the steps worked (or after trying the solutions outlined in your reply), we can take this issue to our support. They'll check the program, probe for any issues, and fix the missing Outlook option for you. 

Their contact details and support hours can be found here: Contact QuickBooks Desktop support. 

After fixing the issue, we can start setting up Outlook in QuickBooks. Check this article out for a guide: Connect your email to QuickBooks Desktop. 

I'd also like to add that if you want to customize your email templates, we have a guide that'll help you with the process: Create custom email templates in QuickBooks Desktop. 

Please let me know if there's anything else I can do for you in setting up your email in QuickBooks. Would you like to record some forms and other entries? Or need to work on your reports? I'd be glad to help you out. Just reply here or create a new thread. 

I'll see you around soon.