01
Exchange SE migration
Review topology and version compatibility; migrate to Exchange SE through an upgrade or migration scenario that Microsoft supports.
SERVICES
Microsoft Exchange Migration
We plan your migration from unsupported Exchange versions to Exchange Server SE, Exchange Online or a hybrid environment step by step, keeping downtime to a minimum.
Explore the detailsÇÖZÜMTEK
Exchange 2016Exchange OnlineHybrid
Overview
Legacy Exchange versions are a security risk
Exchange 2010 and 2013 have long been out of support. Extended support for Exchange 2016 and 2019 also ended on 14 October 2025. Email servers without security updates are exposed to attacks and compliance issues.
The path to Exchange SE depends on your current version and update level. In the scenarios Microsoft supports, Exchange 2019 CU14 and CU15 servers can be upgraded to Exchange SE in place.
Exchange 2016 CU23 environments move by installing new Exchange SE servers and migrating mailboxes. Older update levels are first brought to a supported level, and we choose the right path after reviewing your environment.
Migration involves more than moving mailboxes. We address Active Directory integration, data integrity, security policies and compatibility together, choosing Exchange SE, Exchange Online or a hybrid target architecture for your needs.
SCOPE
Our migration services
02
Exchange Online and hybrid
Move mailboxes, calendars and contacts to Microsoft 365; configure on-premises Exchange and Exchange Online coexistence where needed.
03
DAG and load balancing
Redesign Database Availability Group and load balancer architecture.
04
Mailbox migration
Move mailboxes, public folders and system mailboxes while minimizing disruption.
05
Security and integration
Active Directory, Entra ID, DNS and Autodiscover; certificates, TLS 1.2/1.3, connectors and mail flow.
06
Post-migration validation
Verify mailbox integrity, client connections and performance; retire old servers, optimize and document.
Our approach
Our approach to every project
- 01
Initial assessment
Report on the existing environment, capacity and risks.
- 02
Architecture design
Define the coexistence model and target architecture.
- 03
Pilot migration
Test the migration with selected users.
- 04
Full migration and closure
Move all mailboxes and decommission the old system.
LET'S PLAN TOGETHERLet's review your current
info@cozumtek.com