More Complex Solution for MSWORD

Simultaneously hit the CTRL-SHIFT, and ; keys. Release, then hit the letter to receive an umlaut.

(Note, to type a capital O-Umlaut, you will need to hit the key combination, release, then hit the key combination Shift-O)

For the ß, hit CTRL-SHIFT-7, release then hit the S-key.

Note, these shortcut key-combinations can be customized. The a custom solution for MSWORD)