Operations | Monitoring | ITSM | DevOps | Cloud

Some users in Germany and the United Kingdom who reach Microsoft 365 through Global Secure Access (GSA) may have been unable to use Outlook, Outlook on the web, OneDrive, SharePoint Online, Microsoft Teams and Windows 365 Cloud PCs on October 13, 2026, according to Microsoft's service health updates as recorded by IncidentHub. Microsoft's final update records the start at 07:40 UTC and the end at 18:31 UTC the same day - about 10 hours 51 minutes - and narrows the geographic scope to Germany only.

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.

Impossible travel and new-country sign-in alerts are famously noisy. The reasons why, the difference between the Entra ID and SharePoint signals, and what separates a real account takeover from proxy egress.

A reference mapping MITRE ATT&CK techniques to the SharePoint, OneDrive and Entra ID audit events that actually evidence them, with the detection signal for each.

How to export a Microsoft Teams chat - manual options, Purview eDiscovery for admins, what happens after a user leaves the organization, and why retention is not export.

The Microsoft 365 suite provides a valuable set of business tools and assets that millions of people around the world rely on to accomplish their day-to-day tasks. These include popular services like Word, PowerPoint, and Excel, as well as the Exchange Online email messaging platform, OneDrive cloud-based file storage, and SharePoint cloud collaboration tool.

Microsoft 365 Backup, M365 Archive, Purview retention, EOA, and inactive mailbox - what each one actually does, and where third-party archivers fit.