Navigation Pane is on the left instead of bottom of the Folder List

After an update of Office, Outlook now displays the navigation buttons for Mail, Calendar, Contacts, Tasks, etc… on the left side next to the Folder List.
These Navigation buttons used to be displayed within the Folder List at the bottom.
Where is the option to move the Navigation buttons back to their original location?
Where did it go? Disable Hardware Graphics Acceleration

I’m getting some weird graphics anomalies with my screen when using Outlook.
For instance, the screen suddenly turns completely black or white, and when I move over those spaces with my mouse, the Outlook UI starts to appear again but only in those places.
At other times, text in the Ribbon and Folder Pane overlap or folders appear empty even when they are not.
Restarting Outlook fixes it temporarily but I’d like to fix it permanently.
I was recommended to “disable hardware graphics acceleration” but I can’t find that option anywhere.
How do I solve this issue?
Quick Steps; What are they and why should you use them?
Starting Outlook as an Administrator on Windows 11
Windows 11 and Outlook compatibility
View message in web browser only shows HTML code in Microsoft Edge

Choosing to view a message in a web browser used to open Internet Explorer and display it as a mht-file with all formatting and pictures.
Now when I choose this option, it opens Microsoft Edge but only shows the HTML code of the message and doesn’t actually render the message itself.
With Microsoft (and me) moving away from Internet Explorer, and removing it from Windows 11, how can I properly open the emails in Microsoft Edge or another web browser?
Or is Microsoft going to improve the rendering capabilities in Outlook for HTML emails?
Decrypt S/MIME encrypted emails and save them unencrypted

We receive S/MIME encrypted emails which we need to store in a financial or HR database system that is encrypted and protected otherwise itself as well.
As we save the original message, they remain encrypted and can only be opened by the original recipient that has the S/MIME certificate.
Trying to open these messages from the application gives the error;
Is there a way to remove the S/MIME encryption from a message and save it unencrypted?