Never knew there were seperate steps for exchange 2013 family ;-)
Did you had chance to backup exchange 2010 by anyhow ... If so than you should be ok with new release as well. .except permissions required are minimalist now :-)
Just have a look at 126.96.36.199 release notes on revised permissions for exchange 2013 and 2010.
Also have a look at below GRT video , although it does applies at max extent to exchange 2013 :-)
GRT is not supported with Exch 2013.
See p.20 of DB compatibility guide: http://www.symantec.com/docs/TECH126904
Simply follow steps in NBU for Exchange manual and this video to take snapshot backup:
I would not reccomnded using Exchange 2013 for the time being. There have been issuses with exchange 2013 restores. Currnelty Symantec is waiting on Microsoft to make changes to thier code.
In addtion, please see : http://www.symantec.com/docs/TECH209272
AND please be mindful of this recent Tech Alert, also tracked as a Microsoft issue: