A family of Microsoft word processing software products for creating web, email, and print documents.
I prefer the direct method of using Alt+nnnn to get the ASCII character. You can refer to the following table to get the ASCII code for each letter:
Hold down one of the Alt keys and tap the four digit associated with each ASCII character on the NumPad with NumLck on.
Alternate methods include getting the character from the Insert tab's Symbol command. You can also set up an AutoCorrect entry to replace U ·<period>· <period> with Ü.