Das Blog Cumulative Update für Dezemer 2025 (CU1225) fasst interessante Themen rund um Cloud-Sicherheit, Exchange, Microsoft 365, Microsoft Teams, Copilot & AI, Entra und mehr des Monats Dezember 2025 zusammen.
Mit diesem Blog Cumulative Update kommt einer lang gehegte Tradtition der monatlichen Übersicht interessanter Blogartikel zu einem Ende. Dies ist das letzte Update der Reihe.
Allgemein
- [P] Microsoft Products Reaching End of Support for 2025
- Why Change Fails and How Systems Thinking Helps
- Kerberos Deep Dive for Administrators
AI
- Microsoft 365 Copilot und der KI Haftungsausschluss ein Dezember 2025 Update
- The Hidden Cost of Inaction: Why You Don’t Need a Business Case for Copilot
- The Hidden Copilot Upgrade You Didn’t Know You Needed
- One Foot In Front The Other: How LLMs Work
- Warum der Umgang mit KI gerade gefährlich unkritisch wird
- The Turbo-Charged Abacus: What LLMs Really Are (And Why We Get Them Wrong)
- [P] Microsoft Exchange Server Support Scripts
- [P] Outlook License Requirements for Exchange Features
- Exchange Server SU – Dezember 2025
- Exchange Server SE und Produktschlüssel
- [P] Microsoft 365 Online Services – Product Terms
- [P] Office 365 URLs and IP address ranges
- Microsoft Tenant-to-Tenant Migration Orchestrator
- Exchange Online ActiveSync Device Support Update
- Using ExcludeFromAllHolds to Remove Holds from Inactive Mailboxes
- Removing Retention Holds from Exchange Mailboxes
- How to Migrate from the EWS Get-Delegate Operation
- Advancing Microsoft 365: New capabilities and pricing update
- [P] Teams Devices Deployment Playbook
- [P] Microsoft Teams Feedback Portal
- [P] Security and Compliance in Microsoft Teams
- Großes Update zu Aufzeichnung und Transkription bei Microsoft 365
- Native macOS screen sharing in Teams meetings
Entra ID | Intune
Cloud | Cloud Sicherheit
- [P] Microsoft 365 security recommendations with PowerShell script
- [P] Zero Trust Illustrationen für IT-Architekten und -Implementierer
- Microsoft Defender for Identity Deployment: My top 10 practical recommendations from real environments – Part 1
- Defending against the CVE-2025-55182 (React2Shell) vulnerability in React Server Components
- Auswirkungen für Microsoft 365 und Azure – Gutachten der Uni Köln
- HBDI: Microsoft 365 kann datenschutzkonform genutzt werden
- To Delegate or Not to Delegate — That is the Question
- Demystifying AI Security Posture Management
Microsoft Learning
Schule | Lernen
Microsoft Learn | Tech Community | Knowledge Base
- [P] Microsoft 365 Productivity IllustrationsEntra Well Known Guids
- Microsoft First Party App Names & Graph Permissions
- Application management documentation
- Configure rooms and workspaces for Room Finder in Outlook
- Exchange Online-Dienstbeschreibung
Replay
- Mai 2020: Outlook kann Mail-Adresse nicht finden: legacyExchangeDN als X.500-Adresse in Exchange hinzufügen
- Oktober 2018: How to configure journaling, and the undeliverable reports mailbox, in Exchange Online
- September 2020: Kerberos Explained in a Little Too Much Detail
- Februar 2021: Microsoft Outlook: Empfänger-Zertifikate bei S/MIME verschlüsselten Mails herausfinden
- Februar 2021: Microsoft Outlook: Mit S/MIME verschlüsselte E-Mails können nicht geöffnet werden. Es erscheint die Fehlermeldung “Your digital ID name cannot be found by the underlying security system.”
Podcast Empfehlungen
- [P] Exchange Unplugged
- [P] Cloud-Chroniken
- [P] Talk Microsoft 365
- [P] Collab Talk: #MsftBuzzChat Podcast series
Tools
- EvergreenAdmx
- IPv4 Address CIDR Range Reference and Calculator
- App Governance Accelerator – Entra ID Enterprise Application Governance
- Mailscape 365 – Exchange Online Monitoring und Reporting
- Mailscape – Exchange Monitoring und Reporting
- Active Directory xRay Script
- Teams Lab Tools List
- Microsoft Azure, Cloud and Enterprise Symbol / Icon Set – Visio stencil, PowerPoint, PNG, SVG
Kurz-URL | Short URL: https://granikos.eu/go/Bnnw