Why Does Workplace Outlook Add In Take Up Disk Space in Each User’s Profile and How Can I minimize it?

There are a few reasons why Workplace will take space in the user’s profile.

1. Logging: Workplace saves log files to help developers debug software issues.  The max the file can grow to is 10MB.  You can turn this option off by setting a registry value in the HKLM or HKCU (HKEY_CURRENT_USER\Software\Savance\Eioboard Outlook Addin\EnableLog).  The value can be 1 or 0.
2. In version 7.1 or higher, caching was enabled to speed up the login process and make general usage of the product faster of all network connections.  A registry settings can be set to turn it on or off.  The setting can be placed in HKLM or HKCU (HKEY_CURRENT_USER\Software\Savance\Eioboard Outlook Addin\EnableCache).  The value can be 1 or 0.
3. VSTO loads DLL’s in a cache that is beyond the control of Workplace.  Read more about this here: http://blogs.msdn.com/b/vsod/archive/2008/11/01/office-customization-creates-loads-dll-from-temporary-folder.aspx