My subfolders in the new outlook seem to be sorted by date of change/creation. How can I sort them in alphabetical order?

Interesting observation, thanks for your follow up comment.

I don't remember if I restarted New Outlook after I sorted the folders. Personally, I definitely did not revert back to Old Outlook; I have heard other colleagues who do this regularly though.

For transparency, I am not on the Outlook or Windows team. I do like helping out whenever/wherever I can.

This didn't work for me.

My company uses new Outlook 365. No option "Sort subfolders A-Z" appears when I right-click the parent folder.

Thank you so much, it worked for me :)

Thanks Steve,

My sub folders are for clients, therefore the suggestion doesn't work.

That said, when I accessed my 2025 folder in new Outlook this morning, it suddenly appears to be in alpha order.

All very mysterious however perhaps the solution is to revert to old Outlook, re-sort sub folders A-Z, reboot or wait overnight, and return to new Outlook which will have replicated the folder structure from old Outlook.