Maybe:

http://www.symantec.com/business/support/index?pag...

Daniel

Sync up with Support on following etrack 2743111

To my surprise vxlogcfg should resolve your issue. Do you mean after modifying logging levels LOG still grows with same rate???

Did you tried recycling services and checked after that if logs are growing with lesser increment in details!

Perhaps you should also look at andy's suggestion

And here's the TechNote version of Cap'n Jack's answer:

NCFLBC (NetBackup Client Framework Live Browse Client) log files for a Microsoft Exchange backup grow rapidly and create a low disk space condition on the client.
 http://symantec.com/docs/TECH186750

(Note to self: this TechNote needs some editing)

But...you said you already did this in your original post.  Hmmm.  I guess I too will advise you to open a support case.

EDIT: Actually, now that I think about it - you didn't tell us what version of NetBackup you're at.  Is it possible you're not at 7.5.0.4?  If so, is applying 7.5.0.4 an option?

I have seen this once before... try :

- stop NBU services on exchange

- install_path\VERITAS\netbackup\logs\51216-*-*.log

install_path\VERITAS\netbackup\bin\vxlogcfg -a -p 51216 -o Default -s DebugLevel=0 -s DiagnosticLevel=0

Or

install_path\VERITAS\netbackup\bin\vxlogcfg -a -p 51216 -o Default -s DebugLevel=0

- start NBU services