SharePoint Data Classification: Find and Classify Sensitive Content (2026)
How to classify data in SharePoint Online: classifiers, labels, auto-labeling and on-demand scans, where each one stops, and how to reach archived content.
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Purview Retention Archiving for SharePoint (MC1472601): What It Changes
Purview retention policies can now archive inactive SharePoint files into Microsoft 365 Archive. What MC1472601 and MC1325441 change, the Copilot indexing trade-off, and what to configure before the rollout reaches your tenant.
Teams Chat History Gone After a Colleague Left: Why, and How to Get It Back
Why a Teams chat disappears or shows Unknown User after an employee's account is deleted, where the messages really are, the eDiscovery route, and how to keep leavers' chats.
SharePoint File Shows 'Archived' and Won't Open: How to Reactivate It
Why a SharePoint or OneDrive file is marked Archived, who can reactivate it, how long it takes, the 120-day re-archive lock, and the file-level alternative that restores in one click.
Rehired Employee: Why Their Mailbox Is Empty and Their OneDrive Is Archived
What survives when a former employee comes back: the 30-day restore window, the unlicensed OneDrive clocks, inactive mailboxes, and how to give a returning employee their old data.
Clear the Preservation Hold Library with Priority Cleanup (MC1261587)
Microsoft's priority cleanup can now delete Preservation Hold Library content despite retention policies and holds. The roles, the query, the approvals and the limits.
How Much SharePoint Data Hasn't Been Touched in Years? Report It in GB
Three ways to total the GB of SharePoint files not modified in 2, 3 or 5 years: Purview content search, a PnP PowerShell script and SharePoint Storage Explorer.
Preparing SharePoint for Microsoft 365 Copilot: Archive the Stale Content Without Losing It
What Kantar and Dentsu archived before rolling out Copilot, what Microsoft 365 Archive hides from Copilot, and how to keep old content findable.
SharePoint Advanced Management: Licensing, Cost and Features
What SharePoint Advanced Management includes, which licences unlock it, whether Copilot covers it, and what it does and does not do about SharePoint storage.
Email Archiving Solutions: Which Type You Actually Need
Email archiving means four different jobs, and buying the wrong one is common. Compliance journaling, in-place archives, departed-user archiving and backup compared, with what to check before you buy.