Set different username from email address

Outlook 2019 doesn't allow you to easily set a different username from your email address. The solution is here, which is to run

  outlook.exe /manageprofiles

I found outlook.exe in

  C:\Program Files (x86)\Microsoft Office\root\Office16

Server settings

More settings

Outgoing Server tab: My Outgoing Server requires authentication on

Advanced tab:

Incoming:

Security type: STARTTLS Port: 143

Outgoing:

Hostname: mail.edgarbv.com Security Type: STARTTLS Port: 587

The regedit system doesn't seem to work. The symlink does, but might need a few outlook restarts before it takes.

This is done using a symbolic link. Move the ost file to the new location, open an elevated command prompt and:

  mklink "C:\Users\%username%\AppData\Local\Microsoft\Outlook\robin@edgarbv.com.ost" "G:\Outlook\robin@edgarbv.com.ost"

This will create a .symlink file in the old location.