Post production is a complex and involved process. The more fractured that process, the more difficult it is to achieve a great technical and creative result. A complete post solution delivers every service, facility and deliverable, from start to finish, both sound and picture. Result: more time spent communicating and creating, less time (and money) spent trouble-shooting.
Be sure to provide any fonts used that did not come with Power Point. It is also possible to save or embed the fonts when saving a presentation. If you encounter a message about copyright restrictions then you have a font that didn't come with the software. You will have to manually copy these font files and send them with the presentation.