Add the following keys to the appsettings node of the web.config located in the Raiser's Edge Web Services folder:

<add key="RE7Trace" value="true"/>
<add key="RE7TraceLog" value="path to trace file"/> 
Note: Specify a file name Ex. value="C:\Program Files\Blackbaud\Raisers Edge WebService\log.txt"

Ensure the directory specified above exists on the Web server and grant Full Rights to the Network Service account by following these steps:
  1. Navigate to the folder where the log file exists.
  2. Right click on the folder.
  3. Click Properties.
  4. Click Security.
  5. Click Edit...
  6. Click Add under Group or user names
  7. Under "Enter the object names to select", type Network Service
  8. Click Check Names
  9. Press OK
  10. Under Permissions for Network Service, click the Allow box for Full control
  11. Click Apply
  12. Click OK