All sharing and access request activities of users can be stored as events in Office 365 audit logs. Line managers of employees usually track these for compliance purposes and generate periodic reports of all such activities to present to administrators and auditors.
The following Office 365 reports are available for Sharing and Access Requests:
This report shows information about the list of user requests access that are created / accepted / denied in your SharePoint Online environment with related audit information
This report shows information about the list of company shareable links that are created / used / removed in your SharePoint Online environment with related audit information.
This report shows information about the list of Sharing Invitations that are created / used / removed in your SharePoint Online environment with related audit information.
This report shows information about the list of anonymous links that are created / used / updated / removed in your SharePoint Online environment with related audit information.
This report shows information about the list of files, folders and sites that are Share or Unshared in your SharePoint Online environment with related audit information.
This report shows information about the list of sharing invitations which are withdrawn in your SharePoint Online environment with related audit information.
This report shows information about the list of permission levels added to your site collection in your SharePoint Online environment with related audit information.
This report shows information about the list of Secure links that are created / used / deleted in your SharePoint Online environment with related audit information.
This report shows information about the list of Users added / removed from secure links in your SharePoint Online environment with related audit information.