I got a similar case as the following link.
https://www-secure.symantec.com/connect/forums/c-drive-running-out-disk-space-huge-folder-i2ldvptmp

But my case relate to install latest SEP 11.0.6.562 with Enterprise Vault 8.0 SP3 server.

I have W2k3 Standard 32 bits server and installed SAV 10.1.6 before. 
I found upgrade to SEP 11.0.6.562 version and found low space on drive C.

"C:\Documents and Settings\All Users\Application Data\Symantec\Symantec EndPoint Protection\I2_LDVP.TMP"
It have a lot file with attribute "O". it mean it is EV placeholder file.
File Name Start with msl-428-XXXX

I do exclude folders (Vault storage folder & Index folder) and *.DVS files, but it does not sort it out.

I can't delete them since it is placeholder files; even save mode, I can't delete them.  

I attempt to install EV FSA agent on EV server to delete these files. 

Would someone meet my case and found a way to sort it out completely ?

Any good practice setting of SEP on Enterprise Vault storage server and FSA agent client ?