What is Microsoft 365 business
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Part of the Microsoft 365 for Business series. Related: Microsoft 365 Business Plans ComparedMicrosoft 365 Nonprofit Grant Canada
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Microsoft 365 Business is a cloud subscription that combines the Office apps (Word, Excel, Outlook, Teams), business email on your own domain, 1 TB of cloud storage per user, and built-in security and device management for organizations with up to 300 employees. Instead of buying software outright, you pay a monthly per-user fee in Canadian dollars and always run the latest, fully supported versions.
What you actually get with a subscription
A Microsoft 365 Business licence bundles tools that a company would otherwise buy separately:
- Productivity apps — Word, Excel, PowerPoint, Outlook, OneNote, and depending on the plan, desktop versions you install on your computer.
- Exchange Online email — professional addresses like you@yourcompany.ca with shared calendars and large mailboxes.
- Microsoft Teams — messaging, video meetings and file sharing in one place.
- OneDrive and SharePoint — personal and shared cloud storage that syncs across devices.
- Security tools — multi-factor authentication, malware protection and admin controls.
The exact mix depends on which plan you choose, but every business plan includes email, Teams, storage and an admin centre to manage your users.
How it differs from buying Office outright
Many businesses confuse Microsoft 365 with the old one-time purchase of Office (now sold as Office LTSC or a perpetual Home licence). The differences matter:
- Always current — a subscription updates automatically; a perpetual licence is frozen at the version you bought and eventually loses support.
- Cloud services included — perpetual Office gives you only the apps. Microsoft 365 adds email, Teams, storage and security.
- Per-user licensing — each employee gets the apps on multiple devices, rather than one install per machine.
- Predictable budgeting — a monthly fee versus a large upfront cost every few years.
For a growing business that needs email and collaboration, the subscription model almost always delivers more value than buying standalone apps.
Who Microsoft 365 Business is designed for
The 'Business' family of plans is purpose-built for small and mid-sized organizations with up to 300 users. It suits sole proprietors who want a professional email address, growing teams who need to collaborate remotely, and established companies replacing an ageing on-premise email server.
It is a good fit when you want:
- A professional domain-based email address instead of a generic Gmail or Hotmail account.
- Staff to work securely from the office, home, or client sites.
- One vendor for productivity, communication and basic security.
- The ability to add or remove licences as your headcount changes.
Organizations above 300 users, or with complex compliance needs, typically move to Microsoft 365 Enterprise (E3/E5) plans instead.
Getting set up the right way
Activating Microsoft 365 is easy; configuring it well is where businesses need help. A proper setup covers more than installing apps. It includes connecting your domain so email works, importing existing mail and contacts, enabling multi-factor authentication on every account, and setting OneDrive and SharePoint so files are backed up to the cloud rather than trapped on individual laptops.
For Canadian businesses, the setup should also consider data residency and the privacy obligations under PIPEDA and Quebec's Law 25. Getting the foundation right — security baselines, backup, and clear file structure — prevents the messy cleanup that comes from a rushed do-it-yourself rollout. A managed IT partner can handle the migration and lock down the tenant so staff simply sign in and start working.
FAQ
Is Microsoft 365 Business the same as Office 365?
They are closely related. Microsoft rebranded most Office 365 business plans as Microsoft 365 in 2020 to reflect that the suite now includes more than Office apps — it bundles security, device management and Windows features too. The names are often used interchangeably, but Microsoft 365 is the current branding for these subscriptions.
Can I use Microsoft 365 Business with my own domain name?
Yes. A core feature is professional email on your own domain, such as you@yourcompany.ca. You verify ownership of the domain in the admin centre, then create mailboxes for each employee. This gives your business a credible, branded email address instead of a generic free account.
How many devices can I install Microsoft 365 on?
Each licensed user can typically install the desktop apps on up to five PCs or Macs, five tablets and five phones, signed in with their work account. This lets one employee work on an office desktop, a home laptop and a phone under a single licence, which is ideal for hybrid and mobile work.
Does Microsoft 365 Business include antivirus?
Business plans include malware protection and, in the Premium tier, Microsoft Defender for Business with advanced threat protection and device security. Lower tiers include basic protection plus the security built into Windows. For sensitive data, Business Premium's Defender and Intune controls provide the most complete coverage.