Microsoft Most Valuable Professional 2023I am Thomas Stensitzki, and I work as a principal technology consultant focusing on Microsoft messaging and collaboration technologies. I am the owner of Granikos GmbH & Co. KG. My company provides enterprise consulting and training services for Microsoft Exchange, Microsoft 365, hybrid configurations, and modern collaboration.

Since April 2018, I have been an MVP for Microsoft 365 Apps & Services.

I hold Microsoft Master certifications as Certified Solutions Master Messaging and Microsoft Certified Master for Exchange Server 2010. This makes me a subject matter expert for any messaging topic related to Microsoft Exchange, Exchange Online, Microsoft 365, and hybrid configurations. When not working as a consultant, I teach Microsoft technology courses as a Microsoft Certified Trainer.

I am an MCT Regional Lead, supporting the MCT community in Germany and working closely with Microsoft on training and certification topics.

In February 2019, I published my first book, “Exchange Server 2019 – Das Handbuch für Administratoren”. The second edition, “Exchange – Das Handbuch für Administratoren,” has been available since fall 2022.

My Podcast

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Exchange Server 2019 – Das Handbuch für Administratoren

Cover - Exchange Server 2019 - Das Handbuch für Administratoren

Amazon – Hardcover-Edition

Exchange Server – Das Handbuch für Administratoren

Buch-Cover - Exchange Server - Administrator Handbuch

Rheinwerk Verlag – Hardcover/eBook-Edition
Amazon – Hardcover-Edition

Exchange Öffentliche Ordner – Migration verständlich erklärt

Cover - Exchange Öffentliche Ordner - Migration verständlich erklärt

Amazon – Paperback-Edition
Amazon – Kindle-Edition

Microsoft 365 Business Migration und Konfiguration

Cover Microsoft 365 Business Migration und Konfiguration

Gumroad – PDF-Edition
Amazon – Kindle-Edition
Amazon – Paperback Edition (ISBN 9798663136754)

Microsoft 365 Business Migration and Configuration

Cover - Microsoft 365 Business Migration and Configuration

Gumroad – PDF-Edition
Amazon – Kindle-Edition 

Thomas’ Tech Talk – YouTube Channel (DE)

My Tech Talk series contain videocasts about Exchange Server, Exchange Online, Microsoft Teams, and Microsoft 365 in general. In addition, my YouTube channel contains recordings of user group talks.

Thomas’ Tech & Community Podcast

Whitepapers & Others

Cover - PDF Website Boosting - Geschäfte in Nullkommanichts

Website-Boosting: Geschäfte in Nullkommanichts
Webstandards Magazin
March 2011

Cover - PDF Geschwindigkeit ist keine Hexerei

Geschwingkeit ist keine Hexerei
Website Boosting Magazine
November 2010


Master Certifications

Logo Microsoft Certified Solutions Master Messaging
Logo Microsoft Certified Master - Exchange Server 2010

Microsoft 365 Certified

Microsoft 365 Certified Enterprise Administrator Expert
Logo Microsoft 365 Certified Teams Voice Engineer-Expert
Logo Microsoft 365 Certified Teams Teams Support Engineer
Microsoft 365 Certified Messaging Administrator Associate
Microsoft 365 Certified Teams Administrator Associate
Microsoft 365 Teamwork Administrator Associate

Microsoft Certified Trainer

Microsoft Certified Trainer 2021-2022
Microsoft Certified Trainer 2020-2021
Microsoft Certified Trainer 2019-2020
Microsoft Certified Trainer 2018-2019
Microsoft Certified Trainer 2017-2018

Legacy Certifications

MCSE - Productivity
MCSE - Cloud Platform and Infrastructure
MCSA - Windows Server 2016


Angaben gemäß § 5 TMG:

Thomas Stensitzki
Parkhofstrasse 19A
41836 Hückelhoven


+49 2433 95247 80

Verantwortlich für den Inhalt nach § 55 Abs. 2 RStV

Thomas Stensitzki
Parkhofstrasse 19A
D-41836 Hückelhoven

Gemäß § 28 BDSG wird jeglicher kommerziellen Verwendung und Weitergabe der Daten widersprochen.