There are two ways to fix this. Option 1: Quick and Easy or Option 2: Geek and Tech. If you like tweaking code like I do, then Option 2 is right up your alley. However, do not blame me if your computer crashes into the tech abyss. I gave you an out! Also, see Microsoft’s notes on this process. Help and Support
Option 1 (Quick and Easy)
This change can be done in one Office program to take effect on the entire suite.
On the Tools menu, click Options.
Click the User Information tab.
Type the user name information in the Name box.
Option 2 (Geek and Tech)
So, to fix this problem I had to change the Microsoft UserName registry file. If you are not comfortable going into the registry stop reading now! If you have no idea what the registry is, read this. Windows Registry
Then, if you are feeling brave, continue reading below.
Click START/RUN. Type in regedit and press enter. Go to this path: HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Common\UserInfo.
Double click on user name.
On the right side you will see the current user name. Each letter in the name will be followed by a period. Make sure to keep the periods. Delete the letters you don’t need. When you are done, click OK. Go to File, Exit to quit the registry.