Question:

How to find and inactivate groups used in Vault Document Sharing Settings?

Answer:

To identify the documents where a group has a role, users can do the following:

1. Run a Document Report from the Reporting tab.
2. Select a filter(s) of the roles that are applicable.
3. Set the criteria to in and select the affected group.
4. Once this is completed, the user can perform a Bulk Action. This can only be done on 1000 documents at a time. 
5. The group can be made Inactive from the Vault Admin tab.

Related Documentation:

Vault Group Documentation: Creating And Managing Groups in Vault