Ferdi Lethen-Oellers — Microsoft MVP
Nine bar on
Microsoft 365.
Modern Workplace explained so that key users, digital workplace leads and project managers do something differently afterwards.
- Senior Consultant at amexus
- Author at Wiley
Latest from the roastery.
Application landing zones become workload landing zones – five CAF scenarios vanishMicrosoft is renaming the application landing zone to workload landing zone. More urgent: five CAF scenarios disappear, AVD and SAP on 30 October 2026.
7 min R-04Deleting data nobody wants to deleteRetention periods rarely fail because of Purview. They fail because no named person makes the decision — and here is how to change that.
11 min R-04Retention policy is not deleting — four common causesSimulation mode, legal hold, label beats policy, delayed application. With the PowerShell calls to check all four, one after another, in order.
8 min R-05Microsoft 365 Community – heat freeThere is this one moment when you look at a number and go quiet for a second. For me, that was this summer. I counted the contributions to the Hitzefrei campaign…
5 minEvery origin
tastes different.
SharePoint & Teams
Information architecture, hub sites, permissions, Viva.
Copilot & Adoption
Licensing, business case, usage data, expectations.
Foundry & Azure
Agents, Bicep, Functions, cost control.
Entra & Security
Conditional Access, Purview, retention, compliance.
Change & People
ADKAR, CLARC, key users, internal communication.
Roastmaster means both.
The master is the one who learned the craft. The roaster is the one who knows when to take the beans out. Both are the same work: heat, time and judgement.
I am a Senior Modern Workplace Consultant at amexus and a Microsoft MVP. I build SharePoint, Teams, Entra and Azure landscapes, speak about them in German and English, and write down what goes wrong along the way.
What fifteen years taught me: the tenant is rarely the problem. The translation is.
m365 Macchiato.
Once a month I write down what actually mattered in the Message Center, explain one topic properly and recommend a coffee worth drinking.