The BranchCache feature in Microsoft PowerPoint 2007 does not cache files when you enable it.
To resolve this issue, apply the following hotfix:
2512790 Description of the Office PowerPoint 2007 hotfix package (Powerpoint-x-none.msp, Pptconv-x-none.msp): April 26, 2011
Registry key information
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows