My Outlook 2016 "Start Up Options menu" has no drop down submenu

That is perplexing. I have no idea why what I did worked on my computer I’m just glad it did. What folder did you find the Outlook app? I was surprised to find mine in

C/Program Files/Microsoft Office/root/Office 2016

(The surprise was the root folder. I don’t remember seeing that before) When I did the online repair, I watched it uninstall and reinstall Office 2016. My only other suggestion is to right click on it and try opening as admin. Good luck. It is a perplexing problem.

This does not work in my installation. I did also an online repair but I haven't the start option back, if I open Outlook.exe directly from the folder in C:...

Hierbij nog even de registeraanpassing stapsgewijs ( tekst Tim de Hoog )

1. Sluit alle programma’s af
2. Klik op de Windows startmenu knop
3. Typ “Register” en klik op het “Register-editor”, klik ja om door te gaan
4. Klik bovenin Register-editor op “Beeld” > “Adresbalk”
5. Bovenin verschijnt een balk die begint met bijvoorbeeld “Computer\HKEY_CURRENT_USER…”
6. Plak in de adresbalk “HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Preferences”
7. Druk op “Enter”
8. Aan de linkerkant is de map “Preferences” geselecteerd
9. Klik bovenin op “Bewerken” > “Nieuw” > “DWORD -waarde”
10. Geef deze de naam “ReopenWindowsOption”, deze komt in de rechterlijst te staan
11. Klik dubbel met de linker muisknop op “ReopenWindowsOption”
12. Geef deze de waarde 1, dit betekent “Open vorige items nooit”
13. Zorg ervoor dat “Grondgetal” op “Hexadecimaal” staat ingesteld
14. Sluit Register-editor af en herstart de computer
15. Open Outlook

I have Outlook 2016 on my home computer. Within the last few weeks, on reopening Outlook, I have received the message "Outlook closed while you had items open . Reopen these items from your last session ?".

I have tried to remove this function via File; Options; General; Start up options, but  my Start up options title does not have a drop down menu !

I have opened and reopened the Options menu, but to no avail. Nor is there an option to press on the heading "Start up options" which is located between Privacy Settings and Attachment options

I'm sure that I must have closed Outlook in the past without closing all items, but this message has only begun appearing within the last week.

Is there a fix?

I was having this same issue on Outlook 2016 and then I used on the ONLINE office repair. It still didn't work until I actually clicked "Open" on the Outlook app in the root folder instead of the shortcut. I didn't even have to "Run as administrator." It seemed as if the online repair actually uninstalled my Outlook and reinstalled it but the old toolbar shortcut had issues. I deleted the old shortcut and once it was open correctly, I "Pinned to the toolbar" and all seems well now. I hope this works for the rest of you.

As you can see in the next photo, the options are back.

I was having this same issue until I tried opening Outlook 2016 from its root folder.