Purview labels can now block Copilot file analysis
Microsoft Message Center item MC1297982 says Microsoft is expanding an existing sensitivity label setting for Word, Excel, and PowerPoint. Files with the setting will not be sent to Microsoft connected experiences for content analysis. The item was updated on 3 June 2026. Public preview runs from mid-May to mid-June, with general availability expected from mid-June to late June 2026.
Before this change, a Copilot user might assume a failed summary or analysis was a prompt problem, a licence issue, or a general Copilot limitation. In some cases, it may now be an intentional label decision. For adoption leads, that distinction matters. A useful Copilot playbook needs to explain which documents Copilot can analyse, which documents it should not analyse, and how users should respond when a labelled file behaves differently.
Analysis
Ask your Microsoft 365 or compliance admin which sensitivity labels block content analysis, then add that rule to your team Copilot playbook before people start rewriting prompts to work around it.
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