The article wasn't updated for 11.1.0. From the 11.1.0 guide:
From a computer running Drive Encryption, copy the following files and transfer them to the c:\eede folder on a computer installed with Windows ADK.
■ C:\Program Files\Symantec\Endpoint Encryption Clients\Drive Encryption\*
■ %SYSTEMROOT%\system32\drivers\eed*.sys
■ %SYSTEMROOT%\system32\shfolder.dll
■ %SYSTEMROOT%\system32\drivers\PGPce.*
Note: The PGPce files are available only on Windows systems running Symantec Endpoint Encryption 11.1.0 or later.
https://support.symantec.com/en_US/article.TECH223783.html has the official technote/guide. Might be better to follow that depending on your version.