Exchange on-premises | Exchange Online | Microsoft 365 Security | Active Directory | Azure Active Directory | Teams

Security & Collaboration

Same but different




Consulting and project support on Active Directory, Exchange, and Office 365, e.g. implementing Office 365; consolidation of Active Directory and/or Exchange; migrations during company mergers or sales; optimizations or updates.


IT Architecture

Productions of technical architectural images, IST analyses and requirements catalogues, migration and coexistence concepts, migration planning and test cases.


System Engineering

After the concept work follows the implementation of the developed solutions, transfer to operations as well as operational support.


Powershell Scripting

Powershell scripts to support projects and operations with recurring tasks and processes.

We have high analytical and conceptual skills and get to the bottom of the matter. Uncomplicated but structured, coupled with extensive experience.

Sample project list


Microsoft 365 Security initiative based on Microsoft Defender for Cloud Apps for a client in the energy industry.(approx. 20.000 employees)


Exchange and Active Directory Carve-Out, Office 365 Migration in a Hybrid scenario for a client in the energy industry.   

(approx. 40.000 employees)


Exchange Online and Teams integration for a client in private and public service.
(between 100 and 1000 employees)


Active Directory and Exchange Upgrade at an insurance company.
(between 100 and 1000 employees)

Active Directory cleanup, implementing ADFS and Conditional Access for a client in services.
(approx. 1.000 employees)
Active Directory and Exchange consolidation for a client in public services.
(approx. 26.000 employees)
Supporting an Exchange outsourcing and consolidation project in public serves.
(approx. 70.000 employees)

Exchange outsourcing and consolidation project for a client in industry.
(approx. 100.000 employees)


Implementing AD group policies based on BSI recommendations for Windows Server 2019, Windows 10 and Office 2019, client in public service.
(approx. 200 employees)


Mail migration projects and support for operations for a client in private and public service. 
(between 200 and 1000 employees)

Skills and knowledge

We have extensive knowledge in the following areas:
1 Years

We have 20 years of experience in consulting, IT architecture and system engineering. Agster IT GmbH has been in Düsseldorf since 2017.

successful projects

Through our many years of experience we have already carried out many challenging and diverse projects. Our costumers are companies from a wide range of industries, national and international. 

Smart changes with ease

On your way to the cloud, we support you with technical expertise, intellect, and sensitivity, from start to finish. Basically, there is an opportunity in every change.

CO2 offset

We strive to keep CO2 emissions as low as possible and pay attention to CO2 neutral partners, products, and services in addition to green electricity, climate-conscious travel. Since 2018, we have been determining our CO2e annually and supporting compensation projects worldwide.


We have the following certifications

IT security and data protection

We implement your IT solutions with the relevant data protection regulation (GDPR) and the BSI security recommendations in mind.
Do you have questions?
Stay in touch

Phone: +49 211 566 715 14

Bankstr. 57
D-40476 Düsseldorf