# Mapped Security

You can use Mapped Security to protect documents that you retrieve from SharePoint using the SharePoint OData Connector.

The connector can retrieve security permissions (Access Control Lists) that are attached to items in the repository. The connector adds an Access Control List to each document that is indexed into IDOL. The connector uses LDAP to resolve SIDs in ACLs into user and group names.

The connector can also retrieve SharePoint security group information from the repository and send it to OmniGroupServer. The connector retrieves security group information when OmniGroupServer initiates the connector's `SynchronizeGroups` fetch action.

For detailed information about how to configure Mapped Security for documents retrieved from SharePoint, see SharePoint Mapped Security.

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