Restricting Access is The Most Important Step in a Microsoft 365 Copilot Deployment
I was asked what the most important step is in the deployment of Microsoft 365 Copilot. It’s a good question. Put simply, restricted access is the answer. That is, restricting Copilot access to information stored in Microsoft 365 locations until your tenant is ready for unrestricted Copilot search and retrieval. The fortunate thing is that tools exist today to make it relatively easy to establish guardrails for Copilot, which is exactly what you need to do. https://office365itpros.com/2026/06/10/microsoft-365-copilot-prep/Microsoft Extends Sensitivity Label Block for Connected Services
The BlockContentAnalysisServices sensitivity label setting blocks access to Microsoft connected services for the content of labeled Office documents. The intention is that users assign sensitivity labels with the block setting to protect an organization’s most sensitive files. Regretfully, Microsoft’s documentation and explanation offered in the message center post don’t convey a clear story about its value. https://office365itpros.com/2026/06/08/blockcontentanalysisservices-label/
Microsoft 365 Outlook Classic Latest Update Copilot issues
Hello to all, we are currently using the Microsoft 365 Outlook Classic, using version Version 2604 Build 16.0.19929.20172 (Current Channel) Copilot works as expected; However ever since the next update was released (Version 2605 (Build 20026.20076)) some users including me, have been getting the below error: I have tried uninstalling and installing the latest version directly, with the same issue. Scanned for any corrupted system files with no issues,but still get the error; I have tried the update Licence from the Outlook application, with no issues but the copilot something went wrong error keeps on persisting. Internet searches are very vague and the I have found some registry suggestions which I have also tried with no solution. The only way to get Copilot working on Outlook Classic was to revert to a previous working version, only then Copilot works as expected. This only happens in Outlook Classic; Copilot works fine on the latest version of Microsoft Office 365 with Word, Excel, etc. For those that maybe might ask why not switch to the New Outlook, we have had issues with it and it has been recommended to use the Classic Outlook for the time being. Has anyone been experiencing such issues please? Thanks for any help.SharePoint Online Gets Authoritative Sites
SharePoint Online authoritative sites are trusted sites for Microsoft 365 Copilot to give priority to when using material for chats and search results. Tenants that don’t use Microsoft 365 Copilot appear to gain nothing from the new ability to mark sites as authoritative because it’s all about “Improved relevance and trust in AI-driven responses grounded in authoritative content.” It does seem like a good idea, though. https://office365itpros.com/2026/05/19/authoritative-sites-spo/
