Hosted Exchange to Office 365 Migration
Hosted Exchange (Intermedia, Rackspace, AppRiver, and every smaller provider) → Microsoft 365. Full-fidelity EWS: mail, calendars, contacts, tasks, permissions in one server-side pass. Provider sunsets are accelerating — pre-stage before you give notice. From $15/user.
BitTitan Certified · Zero Data Loss Record · DNS Handled
Every mailbox. Every folder. Verified.
What staying actually costs.
Hosted Exchange providers are leaving the business one by one. Each announcement triggers a stampede — capacity for orderly exits shrinks as deadlines approach.
You’re paying Exchange prices for mail alone. Microsoft 365 bundles Teams, OneDrive, and Defender at the same or lower per-seat cost.
Providers throttle EWS hard near contract end. Start pre-staging BEFORE you give notice — it’s the single biggest timing mistake we rescue.
Evening MX + Autodiscover flip, 2-4 hours, mobile devices re-sync automatically. Pre-staged data means the weekend carries only the delta.
Everything handled. Nothing assumed.
Single-pass EWS migration
Mail, calendars, contacts, tasks, and folder permissions migrate server-side in one full-fidelity pass — the cleanest source type there is, when driven correctly.
Pre-stage weeks ahead
Historical data copies invisibly for weeks before cutover with nightly delta syncs — so provider throttling near contract end can’t hold your data hostage.
Shared mailboxes & delegation
Shared mailboxes recreated with delegation mapped; exec/assistant delegate pairs explicitly re-verified after cutover.
Public folder strategy
Public folders don’t ride along automatically — we scope them explicitly and migrate to M365 public folders or convert to shared mailboxes, whichever fits usage.
Same-night Autodiscover cutover
MX and Autodiscover flip the same evening. Outlook profiles repoint and mobile devices re-sync automatically; stragglers handled in hypercare.
Provider exit coordination
Admin credentials, DNS unlock, export access, and cancellation timing coordinated with the provider — so there’s no service gap and no surprise data purge.
Assess. Plan. Migrate. Cutover.
Assess
1-2 days · Source audit, mailbox inventory, domain list. Fixed per-user quote in 24-48 hours.
Plan
1-2 days · Microsoft 365 tenant provisioned, domains verified, MFA + security baseline deployed.
Migrate
Background · Server-side pre-stage sync runs invisibly. Users keep working on the old system until cutover.
Cutover
2-4 hrs off-hours · MX/SPF/DKIM flip, final delta sync, Autodiscover repoint. 30 days hypercare.
The engineers on your project.
No outsourced ticket triage. The same three engineers handle source assessment, tenant provisioning, cutover night, and post-migration support on every Hosted Exchange engagement.
Sreenivasa Reddy
Founder & Principal Migration Engineer
MCSE Messaging · 25 yrs · 500+ migrations led
Owns the discovery call and migration architecture: source assessment, licensing right-size, and the compliance/security mapping that decides which M365 SKU mix you actually need.
Roshan Pujari
Senior Migration Engineer · Source Systems Lead
Microsoft Certified · M365 Administrator
Runs source-side assessment and extraction: credentials, throttling strategy, batch design, and the pre-stage sync that makes cutover weekends boring.
Bhargav
Senior Migration Engineer · Mail Flow + Cutover
Microsoft Certified · Exchange + M365 Messaging
MX/SPF/DKIM/DMARC cutover and Autodiscover repoint. Owns the 2-4 hour cutover window plus post-cutover Outlook profile and mobile device resync.
The Hosted Exchange-specific realities.
Generic migration guides skip these. They are the operational details that decide whether your cutover weekend is boring — which is the goal.
Providers throttle EWS hard near contract end — pre-staging starts BEFORE you give notice, always
Some providers slow-walk admin credentials or charge for API access — we’ve dealt with every major one and know each playbook
Public folders need explicit scoping — they never migrate "automatically" and are the #1 forgotten item in provider exits
Frequently Asked Questions
Our provider announced end-of-life — how fast can you move us?+
Will we lose calendar sharing and delegation moving to Office 365?+
Why move from hosted Exchange to Microsoft 365 instead of another host?+
What is the downtime during a Hosted Exchange to Microsoft 365 migration?+
Is there any risk of data loss?+
What does the migration include for $15/user?+
Your provider is sunsetting. We’re not.
$15/user flat. Pre-staged sync, off-hours cutover, DNS handled, 30-day hypercare. Zero data loss record across 1.4M users.
Microsoft Solutions Partner · BitTitan certified · Fixed-fee · 500+ migrations
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Top 10 Exchange to Office 365 Migration tools
Summary Migrating to Microsoft 365 (formerly Office 365) can be a complex process, especially when handling various data types like emails, contacts, and calendars. Choosing the right migration tool is crucial to ensure a seamless transition without disrupting your business operations. In this post, we’ll discuss the top 10 Exchange to Microsoft 365 migration tools, […]
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