Hi Abid,

I am assuming you are using  NMM? 2.4? For the SQL backup.

If you are also planning in backing up your Windows 2008 Filesystem, the user should also have Local (Machine) Admin permissions.

You can also specify a Domain account, with enough permissions to Work with SQL and the Filesystem, if there is a domain setup in your environment.

Here is more information on installing and configuring NMM 2.4, for Applications :
https://support.emc.com/docu41359_NetWorker-Module-for-Microsoft-Applications-2.4-Application-Guide.pdf

https://support.emc.com/docu44935_NetWorker-Module-for-Microsoft-Applications-2.4-SP1-Administration-Guide.pdf
https://support.emc.com/docu44937_NetWorker-Module-for-Microsoft-Applications-2.4-SP1-Installation-Guide.pdf

Bruno