Published: 14 June 2026. Source: Microsoft 365 Message Center MC1310687
Microsoft has begun the general availability rollout of Authoritative Sites for SharePoint in Microsoft Copilot. The feature gives SharePoint administrators direct control over which SharePoint Online sites are treated as trusted sources when Microsoft 365 Copilot answers questions or surfaces search results.
What Does Authoritative Site Designation Do?
When an admin marks a SharePoint site as authoritative, Microsoft 365 Copilot Chat and Copilot Search give content from that site higher ranking weight in responses and result sets. In practice, a query about an internal HR policy returns content from the designated HR site ahead of documents scattered across hundreds of team sites. Designated content receives a "From your organisation" label in Copilot Search, giving users a clear signal that results come from a verified internal source.
The feature is most useful for tenants where canonical content - policy documents, process guides, approved templates, compliance records - lives in specific, well-maintained sites that admins can identify with confidence. Rather than leaving Copilot to weigh all indexed SharePoint content equally, authoritative site designation creates a trusted content tier.
Which Licences and Tenants Are in Scope
| Licence or plan | Feature available? | Notes |
|---|---|---|
| Microsoft 365 Copilot (any tier that includes it) | Yes | Authoritative ranking applies in Copilot Chat and Copilot Search experiences |
| Microsoft 365 Business or Enterprise without Copilot | Not applicable | Feature is part of the Copilot experience; tenants without Copilot licences are unaffected |
| GCC / GCC High / DoD | Timeline to be confirmed | Worldwide rollout confirmed for June 2026; government cloud timing was not stated in the initial MC message |
Recommended Admin Actions
You need the latest version of the SharePoint Online Management Shell before running configuration commands. Find the exact PowerShell command in MC1310687 in your Microsoft 365 admin centre Message Centre.
- Update the SharePoint Online Management Shell to the latest available version.
- Identify the 5 to 15 SharePoint sites in your tenant that hold the most authoritative versions of key organisational information. Strong candidates: the intranet home site, an HR policies library, an IT knowledge base, a legal compliance site, and a communications hub.
- Run the PowerShell command from MC1310687 to designate those sites. Test one site first before bulk-designating a full list.
- Validate by running a Copilot Chat query that should surface content from a newly designated site. Confirm the "From your organisation" label appears on relevant results.
- Before designating a site, confirm that permissions on that site are correctly scoped. Content ranked higher in Copilot results is more likely to be cited in user queries - making permission hygiene on authoritative sites more important than ever. A SharePoint permissions audit on each candidate site is a sensible pre-step.
What Is Not Changing
Existing SharePoint permissions remain entirely unchanged. Authoritative site designation is a search ranking signal only. A user without access to a file on a designated site will not see that file in Copilot results; the designation raises the ranking of content the user already has permission to access.
The broader SharePoint search index is also unchanged. Other SharePoint content continues to appear in Copilot results; authoritative sites receive a ranking advantage, not exclusivity.
Admins who have not recently reviewed permission hygiene on their most visible SharePoint sites will find this a useful prompt to do so. ShareMaster's Shared Links and Permissions tool can identify sites where overly broad sharing links or unique permissions have accumulated before those sites receive increased Copilot visibility.
Source: Microsoft 365 Message Center MC1310687, archived at mc.merill.net. General availability rollout: mid-to-late June 2026 worldwide.
Audit SharePoint permissions before designating authoritative sites