I need to review the security of all the shares on my domain

Hi there, i´ll try to explain my problem:

My network is going to be audited and I need to check the
security configuration of all the network shares i have on my domain
to see if just the groups and users that need to have access to each
share are the correctly configured.

Does anyone know any software, script, console or method that can
help me to achieve this without checking manually each share in each
server (it could take ages).

Thanks.

Miguel.

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