A subsite has an AD group associated with libraries and folders, several areas have broken inheritance. A user is added to the AD group but the user cannot access the SharePoint resource. When I try adding the AD group to SharePoint it is unrecognised. I think the AD group has been deleted and SharePoint still associates the group to the resources.
I could try to create the AD group again but dont think this will work as it probably uses an unique identifier.
I think my only option is to find all occurrences of the group in site collection and replace with a new group, the permissions would be full control. Are there any free tools to do this and or PowerShell scripts available for this ?
Thanks in advance