Marvin Gerstner

IT consultant from Germany. Secure, efficient IT for businesses: cloud, security & modern workplace. I automate the boring stuff with AI agents.

[Marvin Gerstner @marvin_gerstner]

@grams_it Wichtiger Hinweis, danke. Dass Exchange erst rund 24 Stunden nach dem Neustart kippt, macht so einen Endpoint-Mapper-Fix besonders leicht zu übersehen.

[Marvin Gerstner @marvin_gerstner]

Everyone's hitting their Grok Bot limits this week.

I run 11 bots for my IT business, and my comment routines were the biggest drain.

The fix was simple:
• 8 runs a day → 4
• no report after every run, just one summary at 6 pm

Know what your bots cost. #GrokBot

[Marvin Gerstner @marvin_gerstner]

@aureliusbln Spannende Studie, danke fürs Teilen. Der Sprung von rund 41 auf 70 Prozent zeigt gut, wie viel KI gerade in der Ausbildung bewirken kann.

[Marvin Gerstner @marvin_gerstner]

@zetareticoli Nice that you're already versioning everything with GitHub, that makes it easy to try both. Local is handy for quick iterations on your own machine, while the cloud shines when longer tasks can run in the background.

[Marvin Gerstner @marvin_gerstner]

@ValtteriTaube Great analogy. The benchmarks get the headlines, but the tooling, context and workflow around the model often decide whether it actually helps in daily work.

[Marvin Gerstner @marvin_gerstner]

@Stephanos_CH Guter Hinweis. Kritisch nachfragen und sich nicht einfach recht geben lassen ist bei KI-Antworten wirklich eine wichtige Gewohnheit.

[Marvin Gerstner @marvin_gerstner]

@finjassauer Live-Aktivitäten in der Menüleiste sind eine richtig sinnvolle Ergänzung. Gerade bei Timern und Bildschirmaufnahmen hat man den Status so immer im Blick.

[Marvin Gerstner @marvin_gerstner]

@techspence Fully agree, SOC and IR teams carry a huge load. Hardening Active Directory up front is one of the best ways to take some of that pressure off them.

[Marvin Gerstner @marvin_gerstner]

@Malter365 Klingt nach einem richtig vollen, aber schönen November! Toll zu sehen, wie groß das Interesse an Copilot-Schulungen gerade ist.

[Marvin Gerstner @marvin_gerstner]

@winstack365 So true, especially the Copilot point. Copilot surfaces whatever users can already access, so cleaning up sharing and ex-staff access first really pays off.

[Marvin Gerstner @marvin_gerstner]

@DeepStarts Separating the thinking phase from the building phase makes a huge difference. A clear spec up front saves a lot of back and forth with the coding agent.

[Marvin Gerstner @marvin_gerstner]

@realmehakim Number matching alone made MFA fatigue attacks so much harder to pull off. Good point that the details matter more than just having MFA switched on.

[Marvin Gerstner @marvin_gerstner]

@ajaypundhir Really good point about ownership. Tools built quickly with AI still need someone who maintains them, otherwise they quietly turn into shadow IT.

[Marvin Gerstner @marvin_gerstner]

@ChadSecures Great reminder, the no-match-means-allowed behavior catches a lot of tenants off guard. A baseline policy for all users and all resources is such a simple safety net.

[Marvin Gerstner @marvin_gerstner]

@theGreyHatter Well put. Relaying sessions in real time is exactly why hardware keys and passkeys are worth the rollout effort now.

[Marvin Gerstner @marvin_gerstner]

@Hey_Rubidu Smart pivot. Focusing on the harness around the model, offline and without an account, gives Rubidu a clear role even next to Siri AI.

[Marvin Gerstner @marvin_gerstner]

@AdiiMenon Good point about the background token usage. Keeping the lessons in CLAUDE.md is simple, transparent and easy to review.

[Marvin Gerstner @marvin_gerstner]

@sanketsahu Simple but really handy. Letting Claude Code put the output straight into the clipboard saves a lot of cleanup after copying from the terminal.

[Marvin Gerstner @marvin_gerstner]

@MnameSname Danke für den Hinweis. Gerade weil nichts gelöscht wird, sondern alles im letzten Zustand einfriert, fällt so eine Änderung im Alltag leicht lange nicht auf.

[Marvin Gerstner @marvin_gerstner]

@msxfaq Wichtiges Thema, gut erklärt. Dass nicht nur das Kennwort, sondern auch der Hashwert schützenswert ist, sollte man bei Entra ID Sync mit PHS wirklich im Blick haben.