How to stop sharing of files and documents of devices sharing Microsoft 365 subscription

To stop sharing files and documents in Microsoft 365, you can take the following actions:

1. Remove Guest Permissions: You can stop sharing with guests by removing their permissions from the shared item or by removing them as a guest in your directory.
2. Delete Sharing Links: If you shared files using an Anyone link, you can stop sharing by deleting the link or turning off Anyone links for the site.
3. Turn Off Guest Sharing: You can disable guest sharing for your organization or for individual sites in the SharePoint admin center. To do this:
   • Go to Policies > Sharing and set the SharePoint slider to Only people in your organization.
   • For individual sites, select the site in the SharePoint admin center, go to the Settings tab, and choose Only people in your organization under External file sharing.
4. Use Sensitivity Labels: To prevent unauthorized sharing, you can encrypt files using sensitivity labels.
5. Implement Data Loss Prevention (DLP): You can create DLP rules to prevent unauthenticated sharing of sensitive content.

These steps will help you manage and restrict sharing effectively within your Microsoft 365 subscription.