The easiest way is to store your map as an image file. Here are the basic instructions:
1. Make all changes to your map, so it is in final form and ready to go.
2. Go to File, then Export. Select an image type. We recommend using the jpeg format for in-text, such as figures in Word, and emf for slides in PowerPoint because they appear better when displayed on a projector. Be sure to remember where you saved it!
3. In your Office document, go to Insert, then select Picture, then From File, and then navigate to where you saved the image. Open and resize as necessary. If you don’t like your image, you can fix it in ArcMap and repeat steps 2 and 3.