Use Auto-Label Policies to Protect Old Files from Copilot

Often Microsoft 365 tenants have large numbers of old but confidential documents that they need to protect and stop Microsoft 365 Copilot finding. Auto-label policies and trainable classifiers can apply sensitivity labels to protect Office files from Microsoft 365 Copilot using the DLP policy for Copilot. It’s a great example of combiining Microsoft 365 features to achieve a goal.

https://office365itpros.com/2025/04/09/trainable-classifier-old-files/