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Microsoft 365 Migration | mstack360
Level 1  ·  Core 365

Microsoft 365 Migration,
Done Right.

We make moving to Microsoft 365 simple, secure, and stress-free. Whether you are switching from Google Workspace, IMAP email, or legacy platforms like GoDaddy, we handle everything end to end with zero data loss and minimal downtime.

Get Started with Core 365 View Migration Scenarios
Your Platform
Microsoft 365
175+ Clients migrated
1,800+ Mailboxes migrated
145+ TB Data transferred
Zero Data loss, guaranteed

Migration Scenarios

Where are you coming from?

We support every major migration path to Microsoft 365. Pick your current platform and we will handle the rest.

Most Popular

Google Workspace to Microsoft 365

Full migration of Gmail, Google Drive, Calendar, and Contacts to Exchange Online, SharePoint, and Outlook with complete fidelity preserved.

Gmail Google Drive Google Calendar Google Contacts Meet Recordings
  • Email with full folder and label structure preserved
  • Drive files migrated to OneDrive and SharePoint
  • Calendar events and shared calendars converted
  • Contacts synced to Outlook address book
Common

IMAP and Hosted Email to Microsoft 365

Migrate from any IMAP-compatible mail host to Exchange Online. We support all major shared hosting providers and legacy setups.

cPanel / WHM Hostinger Bluehost SiteGround Namecheap Ionos / 1&1 Zoho Mail Rackspace
  • All folders, emails, and attachments migrated
  • DNS cutover handled by our team
  • Custom domain setup in M365 included
Legacy

GoDaddy and Legacy Platforms to Microsoft 365

Leaving GoDaddy's Office 365 reseller or Microsoft 365 legacy plans? We handle domain transfers, mailbox migrations, and license reassignment cleanly.

GoDaddy M365 GoDaddy Email Microsoft Reseller Plans Outlook.com Business
  • No double billing during transition
  • Domain verification and admin centre handover
  • Mailbox data preserved during plan switch
Enterprise

On-Premises Exchange to Microsoft 365

Retiring your on-prem Exchange server? We plan and execute cutover, staged, or hybrid migrations based on your organisation size and timeline.

Exchange 2010 Exchange 2013 Exchange 2016 Exchange 2019 Small Business Server
  • Hybrid coexistence support during transition
  • Public folders and shared mailboxes migrated
  • Active Directory sync configured
Collaboration

Slack to Microsoft Teams Migration

Moving from Slack to Microsoft Teams? We migrate your channels, message history, files, and integrations to Teams while preserving your team's collaboration structure.

Slack Channels Direct Messages File Attachments Channel Structure User Mappings
  • Channels migrated to Teams with full history
  • Files and attachments moved to SharePoint
  • User onboarding and Teams training included
  • Integration mapping and setup in Teams
Complex Migration

Tenant to Tenant Migration

Merging companies, splitting departments, or rebranding? We manage full Microsoft 365 tenant to tenant migrations, moving mailboxes, SharePoint sites, Teams channels, OneDrive data, Power Platform apps, and licenses between tenants without disrupting your team.

  • Cross-tenant mailbox and calendar migration
  • SharePoint sites and document libraries moved intact
  • Teams channels and files migrated
  • OneDrive user data transferred
  • Registered Azure AD apps migrated or recreated
  • Power Automate flows and Power Apps recreated
  • Security setup replicated (Conditional Access, MFA policies)
  • Intune policies and device configurations applied
  • License and user account reassignment
  • Domain ownership transfer between tenants

Example: M&A Scenario

Company A
contoso.onmicrosoft.com
MIGRATING
Company B
fabrikam.onmicrosoft.com
Mailboxes
72%
SharePoint
45%
Teams
90%
Power Platform
65%
Security Policies
58%

Our Process

How we migrate you

A proven, structured approach that eliminates guesswork and protects your data at every step.

Discovery

We audit your current environment, users, and data volumes to build the migration plan.

01
02

Tenant Setup

Your Microsoft 365 tenant is configured, licensed, and security-hardened before migration begins.

Pre-Migration Sync

We run an initial data sync in the background with no disruption to your current email flow.

03
04

DNS Cutover

At the agreed time, we update DNS records so new mail flows to Microsoft 365, typically under 15 minutes.

Validation & Handover

We verify everything is working, run final syncs, and hand over with full documentation.

05

What's Included

Everything covered, no hidden extras

Core 365 migration is all-inclusive. You get a dedicated migration engineer, not a DIY tool.

  • Pre-migration assessmentFull audit of your existing environment before we touch anything.
  • Security and compliance baselineMFA, Conditional Access, and spam filtering configured from day one.
  • Mailbox and calendar migrationAll email, folders, calendar events, and contacts moved with zero data loss.
  • DNS and domain managementWe handle all DNS changes and domain verification in Microsoft 365.
  • User onboarding supportDevice setup, Outlook profile configuration, and team walkthrough included.
  • End user awareness and trainingCommunication templates, training sessions, and ongoing support to ensure smooth adoption.
  • Post-migration supportWe stay with you after cutover with a dedicated support window to resolve any issues.

Migration at a glance

From any platform

Google Workspace, IMAP hosts, on-premises Exchange, GoDaddy, and cross-tenant. Every scenario covered under Core 365.

Exchange Online
Business-grade email
SharePoint Online
File and site hosting
OneDrive
1 TB per user
Microsoft Teams
Chat and meetings
Included in Core 365
Email and Office apps plus migration if needed

FAQ

Questions we get asked a lot

Everything you need to know before your migration starts.

Most small to mid-size migrations (under 50 mailboxes) complete within 24 to 48 hours. Larger environments or complex scenarios like tenant to tenant migrations may take 3 to 7 business days depending on data volume. We always share a clear timeline before we begin.
No. We run a background pre-sync before the cutover so virtually all your data is already in Microsoft 365 before we switch. The actual DNS cutover typically takes under 15 minutes and can be scheduled outside business hours to avoid any impact.
Zero data loss is our standard, not a marketing claim. We validate every mailbox before and after migration and run a final delta sync to catch anything created during the cutover window. Your old environment stays intact until you confirm everything is perfect.
Yes. We migrate shared mailboxes, resource mailboxes, distribution groups, and contact lists as part of the standard process. For on-premises Exchange migrations we also handle public folders and room calendars.
As part of Core 365 we can provision your Microsoft 365 licences, recommend the right plan for your team size and needs, and make sure you are never paying for licences you do not need. We are a Microsoft Solutions Partner so you get competitive pricing through us.
A tenant to tenant migration moves your data from one Microsoft 365 organisation to another. This is typically needed after a company acquisition, a rebrand with a new domain, or splitting a business into separate entities. It is more complex than a standard migration and we specialise in it.
We do not disappear after cutover. You get a post-migration support window, full handover documentation, and your Microsoft 365 environment is set up with security baselines, spam filtering, and MFA already in place. If you continue on a Core 365 plan we are your ongoing IT partner from day one.
Yes. For Google Workspace migrations we move Google Drive files to OneDrive or SharePoint. For on-premises environments we can migrate local or network file shares to SharePoint or OneDrive as part of a broader Core 365 or higher-tier engagement.
Free Migration Assessment

Your team deserves
better than their inbox.

Stop patching together old tools and outdated platforms. Microsoft 365 gives your business enterprise-grade email, real-time collaboration, and 1 TB of cloud storage per person. We get you there without the headaches, the downtime, or the data loss.

After your migration is complete, we are available for ongoing retainer and managed support to keep your Microsoft 365 environment secure, optimized, and running smoothly.

Start with Core 365 Book Free Intro Call
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We support English, German, and Arabic speakers

No data loss Zero downtime cutover Ongoing support available