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Microsoft 365 Migration Services

Planned, Executed and Validated by CRT Network Solutions

CRT Network Solutions delivers Microsoft 365 migration services for businesses moving from Exchange, Google Workspace, IMAP mail servers, hosted Exchange or another Microsoft 365 tenant. We plan, run and validate the migration end to end, with users staying productive through the cutover and no data left behind.

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What Our Microsoft 365 Migration Services Cover

We handle discovery, planning, execution and post-cutover support end to end, keeping users productive through the switch and making sure nothing gets left behind on the source side.
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Source Environments We Migrate From

  • On-Premise Microsoft Exchange: Exchange 2010, 2013, 2016 and 2019 servers with Autodiscover, public folders, distribution lists and shared mailboxes handled through the migration.
  • Google Workspace (formerly G Suite): Gmail, Google Drive, Google Contacts and Google Calendar moved into Exchange Online, OneDrive and SharePoint with permissions preserved.
  • Hosted Exchange and IMAP Mailboxes: Third-party hosted mail on cPanel, Rackspace, Zimbra or generic IMAP moved to Exchange Online.
  • Another Microsoft 365 Tenant: Cross-tenant migration for mergers, acquisitions, rebranding or moving off a provider-owned tenant.
  • GoDaddy Microsoft 365 Tenants: See our GoDaddy to Microsoft 365 migration page for the specifics on that scenario.
  • Legacy POP3 or File-Server Email: Extracted, cleaned and migrated with attachments preserved.

Before we do migration to Microsoft 365. The assessment above will help us identify potential challenges and opportunities for optimisation.

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Microsoft 365 Workloads We Migrate

  • Exchange Mailboxes including user, shared, resource and archive mailboxes
  • SharePoint Sites and File Shares with library structure, versioning and permissions preserved
  • OneDrive Personal Storage with folder structure and sharing links maintained
  • Microsoft Teams including channels, tabs, files and chat history where the source platform allows
  • Distribution Lists, Mail-Enabled Security Groups and Microsoft 365 Groups
  • Calendar and Contact Data with recurring meetings, delegate permissions and shared calendars
  • Public Folders consolidated into Exchange Online, SharePoint or Teams

Microsoft 365 Migration Approaches We Run

The right approach depends on mailbox count, source environment, downtime tolerance and how quickly you need to be off the old system.

All mailboxes move over a defined window, usually a weekend. Best for organisations under 150 users where a clean break is acceptable.

Batches of users move across in scheduled waves while others continue on the source environment. Useful for medium businesses where a full weekend cutover carries too much risk.
On-premise Exchange and Microsoft 365 run in parallel with mail flow and directory sync between them. Users move over gradually. Best for organisations over 150 mailboxes.
Encryption is applied to imaging data in transit and at rest. Off-site automated backups are configured for RIS and PACS. Scheduled compliance reviews cover the Australian Privacy Principles, Privacy Act 1988 and Diagnostic Imaging Accreditation Scheme requirements.

Used when the source is a generic IMAP mail platform without Exchange-compatible features.

What Happens at Each Stage

Discovery and Planning

We document your existing mail environment, file shares, user accounts, mailbox sizes, group structures, delegate permissions, third-party dependencies and any custom workflows. From that, you get a written plan covering the migration method, cutover date, DNS and MX record changes, licensing arrangement and rollback procedures. Nothing moves without your sign-off.

Data Preparation

Before migration starts, source data gets cleaned up. Stale mailboxes are archived or removed, oversized mailboxes reduced, orphaned accounts closed, distribution lists rationalised, and legacy attachments or public folder content triaged.

Migration Execution

Data moves in the background while your team keeps working. Depending on the approach, this runs over a single weekend, a series of weekend batches or a multi-week hybrid rollout. Migration jobs are monitored continuously, and data gets validated as it lands in Microsoft 365.

Cutover and DNS Changes

MX records point to Microsoft 365, Autodiscover redirects to Exchange Online, user devices reconfigure to the new tenant, and the source environment gets frozen. Cutover happens during a scheduled window, and we stay online through the following business day to catch anything unexpected.

Post-Migration Setup and Ongoing Support

Once users are working in the new tenant, remaining setup covers policy configuration: conditional access, MFA enrolment, mobile device management via Intune if in scope, retention policies and end-user training. Ongoing managed support is available as a separate arrangement covering user management, licence changes, security posture and helpdesk.

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Why CRT for Microsoft 365 Migration Services

Our team has run Microsoft 365 migrations across small business, medical, legal, professional services and multi-site organisations, with source environments including single-server Exchange 2010 setups and multi-tenant M365 environments after acquisitions. Microsoft Partner status gives us direct access to escalation channels when a migration needs it.

Move to Microsoft 365 Today

Talk to CRT about a Microsoft 365 migration scoped to your source environment, user count and business timeline. We start with a discovery call to understand your current setup and where you want to end up.

Microsoft 365 Migration FAQ

No. During migration, users continue working from their current mail platform while data moves across in the background. The only interruption is a short window during the DNS cutover itself, usually done over a weekend, where mail is briefly queued rather than lost.

Yes. Your domain (example.com.au) moves across as part of the migration. Once we complete the DNS cutover, mail flows to Microsoft 365 automatically, and users keep their existing addresses.

Everything moves across. Mailbox contents including sent items and folders, calendar entries with recurring meetings, contact lists, delegate permissions, distribution lists, shared mailboxes and files in the source system all migrate with structure preserved.

GoDaddy migrations follow a specific process because the source is a GoDaddy-managed partner tenant rather than a directly billed Microsoft tenant. See our GoDaddy to Microsoft 365 migration page for the steps involved.

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What Our Clients Say

Experience Premium Microsoft Migration and Installation Support

Don’t let migration challenges hold you back. Our expert team is here to guide you every step of the way. Contact us today for a free consultation and discover how our Microsoft 365 migration support services can elevate your business.

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Microsoft 365 Migration Support Services

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