Microsoft Exchange Server
Design, deployment and operations for Exchange 2016, Exchange 2019 and Exchange SE — on-premises and hybrid.
Microsoft 365 & Exchange Freelancer — Frankfurt am Main
Senior Microsoft 365 Freelancer for Exchange, Active Directory and Azure
AR IT Solutions is your experienced Microsoft 365 consultant and Exchange freelancer based in Frankfurt am Main. We support system houses, IT companies and mid-market clients with consulting, migration and operations for Microsoft 365, Exchange Server, Exchange Online, Active Directory, Azure and Microsoft Entra ID — on site in the Rhine-Main region, throughout Hesse and Germany-wide remote.
Exchange Microsoft 365 Entra ID Active Directory
Microsoft Technology Stack
Microsoft ExchangeMicrosoft 365Entra IDAzurePowerShellWindows ServerActive Directory
Services
Microsoft 365 consulting, Exchange migration and Active Directory administration
From architecture to operations: senior consulting for Microsoft 365, Exchange Online, Exchange Server, Hybrid Exchange, Active Directory, Microsoft Azure and PowerShell automation.
Microsoft 365 Consulting
Tenant design, configuration, governance and adoption for Microsoft 365 — delivered by an experienced Microsoft 365 administrator.
Hybrid Exchange
Reliable Hybrid Exchange setups between Exchange Server and Exchange Online with clean mail flow and identity sync.
Active Directory
Active Directory architecture, migration, modernization, hardening and trust topologies — delivered by an Active Directory consultant.
Microsoft Entra ID & Azure
Microsoft Entra ID design, Conditional Access, SSO and Azure administration as an independent Azure consultant.
PowerShell & Automation
Automation frameworks, Matrix42 integrations and operational tooling at enterprise scale.
Support Services
2nd & 3rd Level Support for Microsoft 365 and Exchange
Structured escalation support, incident handling and long-term operational partnerships for Microsoft infrastructures — available remote and on site in Frankfurt am Main.
2nd Level Support
Hands-on support for Microsoft 365, Exchange Online and Exchange Server escalations.
3rd Level Support
Deep expert support for complex Microsoft infrastructure topics around Exchange, Active Directory and Azure.
Incident Resolution
Fast, structured response to production-critical incidents — remote or on site in Frankfurt am Main.
Root Cause Analysis
Methodical RCA with clear remediation and prevention measures.
Operational Support
Ongoing operational partnership for stable Microsoft 365 and Exchange platforms.
Infrastructure Health Checks
Structured assessments for Exchange, Active Directory and Azure with actionable roadmaps.
Selected Projects
View all Recent engagements as a Microsoft freelancer
Migration
Exchange 2016 → 2019 Migration
Coexistence design and cutover for a 4,000-mailbox enterprise environment.
Cloud
Microsoft 365 Tenant Migration
Cross-tenant Microsoft 365 migration including mailboxes, OneDrive and Teams.
Hybrid
Hybrid Exchange Deployment
Greenfield Hybrid Exchange setup with Modern Auth and Defender integration.
Testimonials
Trusted by IT teams, system houses and enterprises
“Strategic, calm under pressure, and exceptionally precise. Our Exchange migration ran without a single end-user incident.”
Head of IT Operations
Mid-size enterprise, Germany
“Deep Microsoft 365 expertise paired with clean documentation. Exactly the partner we wanted for our tenant consolidation.”
CIO
Manufacturing group
“Reliable, structured, and pragmatic. The health check delivered clarity we hadn't had in years.”
Infrastructure Lead
Managed Service Provider
Plan your next Microsoft project with an experienced freelancer.
Free initial consultation with a senior Microsoft 365 consultant — pragmatic, independent and result-oriented.