Freelancer profile translated to English.
Back to original languageAbout Mohamed
🎯 Messaging Architect | Office 365 & Exchange Expert | +10 years of enterprise experience
With over 10 years of experience in designing, securing, and migrating large-scale messaging architectures (+100K mailboxes), I support companies in their critical digital transformation projects around Office 365, Exchange (OnPrem/Online), and email security (SPF/DKIM/DMARC, Proofpoint).
🔧 Tenant-to-Tenant, Teams governance, hybrid environments, environment hardening, interoperability, PowerShell automation, M365 administration: I manage projects end-to-end with rigor, agility, and a strong production focus.
✅ My recent projects for groups like SODEXO, GROUPAMA, and ATTJARI WAFA BANK speak for themselves: international migrations, security policy hardening, Microsoft Places integration, and global compliance.
🧰 Key Skills:
Exchange / Office 365 Architecture & Migration
Email Security (SPF, DKIM, DMARC, Proofpoint)
Microsoft 365 & Teams Rooms Governance
PowerShell Automation
M365, Postfix, SendGrid Administration
Let's discuss your Microsoft 365 messaging and collaboration challenges together!
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km)
Experience
- METSYS (Client SODEXO)Messaging ArchitectDecember 2022 - Today (3 years and 8 months)Present, Kazan’, TT, Russia• Implementation of messaging technical architectures (+100K mailboxes)• Technical architecture documentation• Subsidiary migration (Australia & New Zealand) Tenant To Tenant: Domains and Mailboxes• Migration of Exchange OnPrem mailboxes to Office 365• SPF/DKIM/DMARC compliance at Group level (+300 Domains)• MX Remediation for Parked Domains• Development of architecture scenarios for Deny Relay via Proofpoint Gateway• Configuration/Administration Exchange Onprem (2016&2019)/Office 365• Production incident management• Microsoft Places deployment.• Creation of an SMTP service offering (Postfix + Sendgrid)• Study of the different authorization levels offered by Graph API for Exchange to only allow those consistent with group security guidelines.• Study of different possibilities to block auto-forwarding via User or Admin Rules, leveraging Office 365 and Proofpoint Gateway• Study of different possibilities to enforce mail flow specific to MOERA domains (OnMicrosoft) via Proofpoint Gateway• Study of the scenario for using a Full Cloud account for MTR Rooms• Implementation of a system allowing Teams Rooms to join third-party meetings (e.g., ZOOM)• Participation in various Office365 related projects• Automation and optimization of tasks / PowerShell scripts• Proofpoint Administration (Gateway & EFD)• Postfix Administration
- ITS Group (Client GROUPAMA)Office 365 ConsultantNovember 2021 - December 2022 (1 year and 1 month)92800 Puteaux, France• Implementation of messaging technical architectures (+100K mailboxes)• Technical architecture documentation• Migration from Lotus Notes to Exchange Online• Administration of Cisco ESA + SMA Gateways• Maintaining infrastructure consistency and capacity management• Managing inter-company transfers (messaging and AD accounts)• Incident and change management• Administration of M365 collaborative tools: Exchange OnPrem (2016&2019), Exchange Online, SharePoint Online, OneDrive, Teams, …• Implementation of conditional access• MFA deployment
- Attijari Wafa BankOffice 365 ConsultantSeptember 2020 - November 2021 (1 year and 2 months)Casablanca, Morocco• Implementation of messaging technical architectures (+50K mailboxes)• Technical architecture documentation• User migration from Lotus Notes to Exchange Onprem (2016&2019)/Exchange Online• Management of Office 365 license billing• Implementation of Ms Teams/Polycom interoperability• Organization/Management of Ms Teams Live Events• Implementation of Azure Privileged Identity Management• Implementation of Ms Defender Policies• Implementation of conditional access• Global Office 365 Administration• Implementation of Power BI Premium workspaces• Task automation via Power Automate• Creation of SharePoint Online sites• L3 Support, incident/request management, and escalations to Microsoft
Recommendations
Be the first to recommend Mohamed
Help this freelancer shine by sharing your experience working together.
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Master MIAGUniversité Mohamed 52014Master MIAG
- Baccalaureate in Electrical Sciences and TechniquesLycée technique Mohamed 52008Baccalauréat Sciences et Techniques Electriques