Microsoft MVP · DACH Region
Welcome to the
M365 Röstmeister
Where the aroma of espresso meets the power of Microsoft 365.
Ferdi Lethen-Oellers — Microsoft MVP, Author and Speaker. Practical M365 know-how on Copilot, Azure, Teams and Entra ID. No theory. No coffee grounds.
Microsoft 365 Administration für Dummies
The essential Microsoft 365 administration handbook for the modern workplace
The first German-language handbook specifically for Microsoft‑365 administrators — practical, clear and straight from the DACH community.
Pre-Order Now →About me
Senior Modern Workplace
Consultant & Microsoft MVP
“Microsoft 365 is only as good as the people using it. My job is to close that gap.”
I work as Senior Modern Workplace Consultant at amexus, helping organisations unlock the full potential of Microsoft 365 — from Teams to Copilot to Entra ID. As a Microsoft MVP I bring community knowledge directly into practice.
More about meExpertise
My Topics
From Copilot to Azure — practical, not theoretical.
Microsoft Copilot & Copilot Studio
Putting AI to work in everyday workflows — from M365 Copilot to custom agents.
Microsoft Viva Suite
Strategically rolling out Employee Experience — Learning, Engage, Connections and Amplify.
SharePoint & Microsoft Teams
Collaboration and intranet structures people actually use.
Entra ID & Conditional Access
Identity, MFA and Zero Trust — without locking yourself out.
Intune & Modern Device Management
Device management like a pro — Shared Device Mode, kiosk and compliance.
Microsoft Azure
From fundamentals to Management Groups — cloud architecture explained clearly.
Röstmeister Blog
Freshly brewed.
Posts coming soon — the espresso machine is warming up.
Podcast on Spotify
M365 Espresso Talk
In-depth conversations about Microsoft 365, the modern workplace and digital transformation in the DACH ecosystem.
Listen on Spotify →LinkedIn Newsletter
M365 Macchiato
Microsoft‑365 insights served fresh every four weeks — crisp, practical and always with a shot of espresso.
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