Netbackup / Exchange 2010 DAG backup

I am running a configuraton with 5230 appliances (2603) and Exchange 2010 on W2K8R2 in a DAG environment.

I have mutiple mailbox databases and a number of public folder databases.

I want to secure all of the mailbox databases on a daily/weekly/monthly basis but include the public folder databses on a monthly basis only.  In addition, I want to process the mailbox databases in a multi-streaming fashion to get the best throughput as we have approx 6TB of mailbox databases.

After researching this I see the following as an option:

1. Use the DATABASE AVAILABILITY GROUP directive in the backup selections which will include everything in the DAG

2. Add an exlucude for the public folder databases on the Exchnage clients (do I need this on just both of the DAG members or on the CAS servers also ?).  What is the format of the exlcude ?  Microsoft Exchange Public Folders:\folder-name

3. How do I then ensure the mailbox databases will process concurrently ?  I currently have ALLOW MULTIPLE STREAMS set in the policy attributes, and have NEW STREAM set once ahead of the MICROSOFT EXCHANGE DATABASE AVAILABILITY GROUP directive.  This appears to create one job (snapshot and backup) for each DAG member.  I want to process multiple databases concurrently - do I need to omit the NEW_STREAMS directive altogether and limit the jobs per policy to say 10 ? (as in the HOWTO7302 document - excerpt below)

• When you do not enable multiple backup streams, all of the databases for a snapshot job are backed up in a single backup job.

• When you enable multiple backup streams and do not specify any NEW_STREAM directives, each database is backed up in its own backup job.

• When you enable multiple backup streams and do specify NEW_STREAM directives in your policy, then NetBackup tries to group the database backups into jobs according to the placement of the NEW_STREAM directives in the backup selection list. The result is affected by the grouping of database backups into snapshot jobs. NetBackup separates backup jobs after any database that is followed by a NEW_STREAM directive in the policy.

I am selecting GRT here also - NFS installed, Distributed Application Mapping set etc.

Bottom line, I want to have a policy selection list which is simple and requires no maintenance (ideally just MICROSOFT EXCHANGE DATABASE AVAILABILITY GROUP), be able to exclude the public folder databases and be able to process the mailbox databases concurrently.

Any input much appreciated.

AJ.