Using TTS in Microsoft Word (Office 365 version)
Use the Read Aloud option, also called Speak. The Read Aloud option is available on the Review menu bar. Select the piece of text you want spoken, and click the Read Aloud button.
The Speak option does the same, but can be added to the Quick Access Toolbar. This article shows how to do this.
You can change the speed of the voice in the Control Panel. Select the Speech Recognition option, then Text to Speech.