Rackspace to Office 365 Migration
Rackspace Email or Rackspace Hosted Exchange → direct Microsoft 365 tenant. Full-fidelity EWS for Hosted Exchange, server-side IMAP for Rackspace Email. Pre-staged sync, weekend cutover, DNS handled. From $15/user.
BitTitan Certified · Zero Data Loss Record · DNS Handled
Every mailbox. Every folder. Verified.
What staying actually costs.
Rackspace has been exiting the Hosted Exchange business since the 2022 ransomware incident. Staying means betting your mail on a product line in wind-down.
Rackspace mail alone costs what Microsoft 365 Business Standard charges for mail + Teams + OneDrive + Office apps. The math stopped working years ago.
Rackspace throttles EWS/IMAP per connection — DIY migrations stall for weeks. We parallelize batches across connections instead of hammering one pipe.
Actual downtime is the 2-4 hour off-hours MX flip. Pre-staged sync means the weekend cutover only carries the final delta.
Everything handled. Nothing assumed.
EWS full-fidelity transfer
Rackspace Hosted Exchange migrates mail, calendars, contacts, and tasks server-side over EWS in one pass — folder structure and permissions intact.
Rackspace Email (IMAP) path
Rackspace Email has no server-side calendar/contact API. Mail syncs over IMAP; calendars and contacts move via scripted exports we run — included in the price.
Pre-stage + delta sync
Historical mail copies in the background for days or weeks while users keep working. Cutover weekend only carries the final delta — hours, not days.
DNS + MX cutover
MX, SPF, DKIM, DMARC, and Autodiscover re-published — whether DNS lives at Rackspace Cloud DNS, Cloudflare, or your registrar.
Distribution lists & aliases
Every list, alias, and forwarder inventoried from the Rackspace control panel and recreated in Microsoft 365 before cutover.
Security baseline
MFA, Conditional Access-ready Entra ID, Defender for Office 365, and spam policy tuned in the new tenant before a single user lands.
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 Rackspace 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 Rackspace-specific realities.
Generic migration guides skip these. They are the operational details that decide whether your cutover weekend is boring — which is the goal.
Rackspace throttles EWS/IMAP per connection — we parallelize small batches instead of one big pipe, or the sync stalls for weeks
Rackspace Email keeps calendars/contacts webmail-side only — those need the scripted export path, which we own end-to-end
MX records often live at Rackspace Cloud DNS — we re-point or transfer DNS as part of cutover so nothing is left behind on a dying platform
Frequently Asked Questions
How do you migrate Rackspace email to Office 365?+
Does Rackspace charge an exit fee to migrate away?+
Rackspace Email vs Rackspace Hosted Exchange — does it change the price?+
What is the downtime during a Rackspace to Microsoft 365 migration?+
Is there any risk of data loss?+
What does the migration include for $15/user?+
Exit Rackspace before it exits you.
$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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