Microsoft 365 Migration Guide for Melbourne Businesses

Moving your business to Microsoft 365 is one of the most impactful IT decisions a small business can make — giving your team professional email, collaborative document storage, video meetings and security tools in a single monthly subscription. Done correctly, a Microsoft 365 migration is seamless. Done incorrectly, it causes days of email downtime, lost data and frustrated staff. This guide walks you through exactly how to migrate your Melbourne business to Microsoft 365 with zero data loss and minimal disruption.

What Does a Microsoft 365 Migration Include?

A full Microsoft 365 migration for a Melbourne small business typically includes migrating all of the following. How complex the migration is depends on what you are moving from — a hosted email provider, on-premise Exchange server, Google Workspace or POP/IMAP accounts all require different approaches.

Before You Migrate — What to Assess First

A successful Microsoft 365 migration starts with understanding exactly what you have and what needs to move. Rushing this step is the cause of most migration problems.

Current email setup

• POP/IMAP accounts (e.g. via your web host): Simplest migration. Emails are typically stored locally on devices. You will need to export and import mailboxes or use a migration tool.
• On-premise Exchange Server: More complex. Requires a hybrid migration or cutover migration depending on your server version and business size.
• Google Workspace / G Suite: Use Microsoft’s Google Workspace migration tool. Emails, contacts and calendars can all be migrated.
• Another hosted provider (Telstra, Crayon, etc.): Usually an IMAP migration. The main consideration is ensuring all emails are accessible via IMAP before migrating.

Domain and DNS

Your business domain (e.g. yourbusiness.com.au) must be verified in Microsoft 365 and your DNS MX records updated to point to Microsoft’s mail servers. This is the step that “cuts over” email delivery to the new system. Plan this carefully — once MX records are updated, new emails route to Microsoft 365 immediately.

Licence selection

• Microsoft 365 Business Basic ($10.50 AUD/user/month): Web-only Office apps, email, Teams, SharePoint — suitable for businesses where staff mainly work in a browser
• Microsoft 365 Business Standard ($21.20 AUD/user/month): Desktop Office apps (Word, Excel, Outlook) + email, Teams, SharePoint — recommended for most Melbourne SMBs
• Microsoft 365 Business Premium ($34 AUD/user/month): Everything in Standard + advanced security (Intune, Defender for Business) — recommended for businesses handling sensitive data

Microsoft 365 Migration — Step by Step

1. Set up your Microsoft 365 tenantCreate your Microsoft 365 account at microsoft.com, add your business domain (yourdomain.com.au) and verify ownership by adding a TXT record to your DNS. Set up your admin account and configure basic security settings before any users are added.
2. Create user accounts and assign licencesCreate a mailbox for every staff member in the Microsoft 365 admin centre. Assign licences. Do not update DNS yet — existing email continues to flow to your old system while you prepare.
3. Configure security before go-liveEnable multi-factor authentication for all accounts. Configure anti-spam and anti-phishing policies. Set up SPF, DKIM and DMARC DNS records for your domain. This takes 30 minutes and prevents your new Microsoft 365 tenant from being compromised on day one.
4. Migrate existing email dataUse the Microsoft 365 admin centre migration tools or a third-party tool (MigrationWiz, BitTitan) to copy existing emails, folders, contacts and calendars to the new mailboxes. This runs in the background — your existing email continues to work during this process.
5. Run a pilot migration with a test userBefore cutting over all users, fully migrate one staff member and test all email functions, calendar, contacts and shared mailbox access. Identify and resolve any issues before affecting the whole business.
6. Update DNS MX records — the cutoverThis is the moment new emails start flowing to Microsoft 365. Change your domain’s MX records at your DNS provider. DNS propagation takes 15 minutes to 4 hours. Plan this for after-hours or a Friday evening to minimise business impact.
7. Set up Outlook on all devicesAdd the new Microsoft 365 account to Outlook on every computer, phone and tablet. If using desktop Outlook, create a new profile rather than adding to an existing one to avoid legacy profile issues.
8. Migrate files to SharePoint and OneDriveMove shared network drive contents to SharePoint document libraries. Configure OneDrive sync on all devices. Set appropriate permissions so staff can only access folders relevant to their role.

Typical Migration Timeline for a Melbourne Small Business

Common Microsoft 365 Migration Mistakes to Avoid

• Cutting over DNS before email data is migrated: If you update MX records before your old emails are copied across, new emails arrive in Microsoft 365 but existing emails are still in the old system. Staff end up with two inboxes to check.
• Not configuring SPF, DKIM and DMARC: Skipping these DNS records means your emails from Microsoft 365 may be marked as spam by recipients. Set these up before cutover.
• Not enabling MFA on day one: New Microsoft 365 tenants without MFA are immediately targeted by credential-stuffing bots. Enable MFA before the first user logs in.
• Forgetting shared mailboxes and distribution groups: Most businesses have shared mailboxes (e.g. info@, accounts@) and email groups that need to be migrated and recreated. Audit these before starting.
• Not training staff: Even a seamless technical migration causes frustration if staff are not briefed on how to use Outlook on Microsoft 365, where their files have moved and how Teams works.

Post-Migration Security Hardening

Once your migration is complete, these security configurations should be in place before you consider the job done:

• MFA enabled for all users — Microsoft Authenticator app recommended
• Conditional Access policies configured (block sign-ins from high-risk countries)
• Microsoft Defender for Office 365 anti-phishing and Safe Links enabled
• SPF, DKIM and DMARC DNS records configured and verified
• Admin accounts have dedicated admin accounts — not their daily-use mailbox
• Third-party backup for Microsoft 365 data configured and tested
• Legacy authentication protocols disabled (prevents bypassing MFA)
• Email retention policies configured as required for your industry

A Microsoft 365 migration managed correctly typically takes 2 to 3 weeks for a small business and causes zero email downtime for staff. Unifill IT has migrated businesses across Melbourne’s western suburbs to Microsoft 365 — call 0452 330 180 or visit unifill.com.au to discuss your migration.