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Office 365 vs. Microsoft 365 – Explained

Microsoft 365, Technical
Microsoft 365 vs Office 365 image
By Priasoft Editorial Team · Published January 30, 2019 · Updated April 23, 2026


What’s The Difference Between O365 And Microsoft 365?

Simply put, Office 365 is a cloud platform that offers Exchange online, OneDrive, Word, Excel, Outlook, as well as other services and applications via a subscription plan whereas Microsoft 365 offers the same services and applications as Office 365 but also includes Windows 10 Pro and Enterprise, Mobility + Security for a complete Enterprise offering under a single subscription plan.

Microsoft 365 offers customers, which have not made the transition to Office 365, is an out of the box solution with all the features of Office 365 plus Windows 10, including security and device management right from the start. Additionally, Microsoft 365 is the beginning of a future where desktops and devices are primarily joined to your Office 365 Azure Active Directory subscription taking over the traditional on-premises role of Active Directory running on servers in your datacenter. With this new paradigm, you would generally only need to maintain a backup Active Directory Domain Controller on-premises for redundancy in the event of a temporary loss on network connectivity.

If you are already on Office 365 you still have the option to deploy Windows 10 Pro and subscribe to a security service, however, this approach is not as simple as subscribing to Microsoft 365 from the beginning.

If you would like to learn more about Office 365 and Microsoft 365 we have provided some resources to get you started. If you would like to speak to one of our cloud migration specialists you can contact us here.


Resources To Get You Started


Transform Your Workplace With Microsoft 365


New Tools To Help Prepare For Deployment And Ensure PCs Are Up-To-Date


Microsoft 365 Security – Everything You Need To Know In 8-Minutes


Azure AD Pass-Through Authentication And Seamless Single Sign-On

Ready to Talk Through Your Migration?

Priasoft has been handling Exchange and Microsoft 365 migrations since 1999. Whether you're scoping a new project or recovering from a stalled one, our engineers have seen it before. No sales pitch — just a working conversation with people who have done this work at scale.

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Related Reading

  • Tenant-to-Tenant Migration Checklist: What to Do Before You Move a Single Mailbox Tenant-to-Tenant Migration Checklist: What to Do Before You Move a Single Mailbox May 19, 2026
  • What Is Super-ExMerge and Why Do IT Teams Still Need It in 2026? What Is Super-ExMerge and Why Do IT Teams Still Need It in 2026? May 12, 2026
  • Exchange 2019 Patches Just Ended. Here Is What IT Teams Need to Do This Month. Exchange 2019 Patches Just Ended. Here Is What IT Teams Need to Do This Month. May 5, 2026
January 30, 2019
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https://www.priasoft.com/wp-content/uploads/2019/01/microsoft-365-image.jpg 384 690 Priasoft Editorial Team /wp-content/uploads/2016/01/Pria_email_logo.png Priasoft Editorial Team2019-01-30 18:41:342026-04-23 13:19:40Office 365 vs. Microsoft 365 – Explained

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    Tenant-to-Tenant Migration Checklist: What to Do Before You Move a Single MailboxMay 19, 2026 - 2:00 pm
  • Super-ExMerge (SXM)
    What Is Super-ExMerge and Why Do IT Teams Still Need It in 2026?May 12, 2026 - 2:00 pm
  • Priasoft Migration Suite for Exchange (PMSE)
    Exchange 2019 Patches Just Ended. Here Is What IT Teams Need to Do This Month.May 5, 2026 - 2:00 pm

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The Exchange Experts – Who Are We?

Priasoft, a Microsoft Partner, offers enterprise-class solutions for Exchange migration, management, and eDiscovery. Supporting Exchange 2010, 2013, 2016, 2019, and Office 365/Exchange Online, our platform enables secure migration, management, and organization of email data, with advanced tools for compliance, public folder analysis, and AI-driven insights.


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Recent Posts

  • Tenant-to-Tenant Migration Checklist: What to Do Before You Move a Single Mailbox
  • What Is Super-ExMerge and Why Do IT Teams Still Need It in 2026?
  • Exchange 2019 Patches Just Ended. Here Is What IT Teams Need to Do This Month.

Contact Priasoft – The Exchange Experts

Have questions? Speak to a Priasoft Engineer
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