365 Business Premium

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Microsoft Office 365 Small Business Premium 32/64-bit. Microsoft Office 365 Small Business Premium 32/64-bit. Microsoft Edge enterprise sync services are now available for Microsoft 365 Business Premium (formerly Microsoft 365 Business) subscribers. If you were already a Business Premium subscriber before April 30, 2020, you may need to sign out of Microsoft Edge and sign back in again to get sync working. To sign out of Microsoft Edge, make.

365 business premium support

Watch this video for an overview of Microsoft 365 Business Premium setup.

Add your domain, users, and set up policies

When you purchase Microsoft 365 Business Premium, you have the option of using a domain you own, or buying one during the sign-up.

  • If you purchased a new domain when you signed up, your domain is all set up and you can move to Add users and assign licenses.

Add your domain to personalize sign-in

  1. Sign in to Microsoft 365 admin center by using your global admin credentials.

  2. Choose Go to setup to start the wizard.

  3. On the Install your Office apps page, you can optionally install the apps on your own computer.

  4. In the Add domain step, enter the domain name you want to use (like contoso.com).


    If you purchased a domain during the sign-up, you will not see Add a domain step here. Go to Add users instead.

  5. Follow the steps in the wizard to Create DNS records at any DNS hosting provider for Microsoft 365 that verifies you own the domain. If you know your domain host, see also the host specific instructions.

    If your hosting provider is GoDaddy or another host enabled with domain connect, the process is easy and you'll be automatically asked to sign in and let Microsoft authenticate on your behalf.

Add users and assign licenses

You can add users in the wizard, but you can also add users later in the admin center. Additionally, if you have a local domain controller, you can add users with Azure AD Connect.

Add users in the wizard

Any users you add in the wizard get automatically assigned a Microsoft 365 Business Premium license.

  1. If your Microsoft 365 Business Premium subscription has existing users (for example, if you used Azure AD Connect), you get an option to assign licenses to them now. Go ahead and add licenses to them as well.

  2. After you've added the users, you'll also get an option to share credentials with the new users you added. You can choose to print them out, email them, or download them.

365 business premium vs standardDownload office 365 business premium

Connect your domain

365 Business Premium Price


If you chose to use the .onmicrosoft domain, or used Azure AD Connect to set up users, you will not see this step.

To set up services, you have to update some records at your DNS host or domain registrar.

  1. The setup wizard typically detects your registrar and gives you a link to step-by-step instructions for updating your NS records at the registrar website. If it doesn't, Change nameservers to set up Microsoft 365 with any domain registrar.

    • If you have existing DNS records, for example an existing web site, but your DNS host is enabled for domain connect, choose Add records for me. On the Choose your online services page, accept all the defaults, and choose Next, and choose Authorize on your DNS host's page.

    • If you have existing DNS records with other DNS hosts (not enabled for domain connect), you'll want to manage your own DNS records to make sure the existing services stay connected. See domain basics for more info.

  2. Follow the steps in the wizard and email and other services will be set up for you.

Protect your organization

The policies you set up in the wizard are applied automatically to a Security group called All Users. You can also create additional groups to assign policies to in the admin center.

  1. On the Increase protection from advanced cyber threats, it is recommended that you accept the defaults to let Office 365 Advance Threat Protection scan files and links in Office apps.

  2. On the Prevent leaks of sensitive data page, accept the defaults to turn on Office 365 Data Loss Prevention (DLP) to track sensitive data in Office apps and prevent the accidental sharing of these outside your organization.

  3. On the Protect data in Office for mobile page, leave mobile app management on, expand the settings and review them, and then select Create mobile app management policy.

365 Business Premium

Secure Windows 10 PCs

On the left nav, select Setup and then, under Sign-in and security, choose Secure your Windows 10 computers. Choose View to get started. See secure your Windows 10 computers for complete instructions.

Deploy Office 365 client apps

If you chose to automatically install Office apps during setup, the apps will install on the Windows 10 devices once the users have signed in to Azure AD from their Windows devices, using their work credentials.

To install Office on mobile iOS or Android devices, see Set up mobile devices for Microsoft 365 Business Premium users.

You can also install Office individually. See install Office on a PC or Mac for instructions.

See also


Microsoft 365 Business Premium has everything you need for your small business, combining the best-in-class cloud-based productivity apps with simple device management and security. If you currently have an Office 365 E3 subscription, but don't have more than 300 employees, consider switching to Microsoft 365 Business Premium for added security features.

Migrating is easy: First you switch licenses and all your data and user information in your current subscription is maintained. After the migration, you'll need to set up the features that are added in Microsoft 365 Business Premium.

Differences between Office 365 E3 and Microsoft 365 Business Premium

This table shows the differences between Microsoft 365 Business Premium and Office 365 E3.

365 Business Premium Price

FeatureSupport in Microsoft 365 Business PremiumSupport in Office 365 E3
Office apps1Microsoft 365 Apps for businessMicrosoft 365 Apps for enterprise
Cloud productivity apps
Exchange Online and Outlook50 GB storage limit per mailbox and unlimited Exchange Online Archiving100 GB storage limit per mailbox and unlimited Exchange Online Archiving
OneDrive for Business1 TB storage limit per userUnlimited
Yammer, SharePoint Online, Planner, Stream
Threat Protection
Defender for Office 365 Plan 1Not included, but can be added on
Identity management
Self-service password reset for hybrid Azure Active Directory (Azure AD) accounts, Azure AD multi-factor authentication (MFA), Conditional Access, password writeback for on-premises identities
Device and app management
Microsoft Intune, Windows AutoPilot
Shared computer activation
Upgrade rights to Windows 10 Pro from Win 7/8.1 Pro licenses
Information protection
Office 365 Data Loss Prevention
Azure Information Protection Plan 1, BitLocker enforcement
Azure Information Protection Plan 1, Sensitivity labels
Client Access License (CAL rights)
Enterprise CAL Suite (Exchange, SharePoint, Skype)

1 The Microsoft 365 Business Premium version of the Office apps doesn't include volume activation through Group Policy, app telemetry, update controls, spreadsheet compare and inquire, or business Intelligence.


To migrate your subscription, see Change plans manually for instructions if you want to move just a few people to Microsoft 365 Business Premium. You can also upgrade everyone automatically, or work with a partner to move your E3 subscription and licenses to a Microsoft 365 Business Premium subscription.The following sections describe the changes you need to make, if any, and what you can do after the migration.

Office 365 E3 subscription configuration and data

You don't need to do any changes to your current subscription or data before migrating, which includes:

  • Subscription configuration, such as DNS records and domain names.
  • User and group accounts and authentication settings, such as multi factor authentication or conditional access policies.
  • Productivity service configurations and their data, such as Teams, Exchange Online mailboxes, SharePoint Online sites, OneDrive for Business folders, and OneNote notebooks.
  • Office applications will scale automatically. Office 365 modern licensing will check the user’s license assignment every 72 hours and will convert Office applications to the version that matches the user subscription.

Windows 10

If your Windows aren't already on Windows Pro Creator update, upgrade them to Windows Pro Creators Update.

Set up policies to protect user devices and files


If you set up Office 365 MDM policies and devices, those devices will be listed on the Devices page in the Microsoft 365 admin center. Any policies you set up will show up in the list of classic policies in the Intune portal.

After you have assigned licenses to Microsoft 365 Business Premium, you can start protecting the users' devices and files.

If you upgraded everyone in your organization to Microsoft 365 Business Premium, you'll see the setup wizard on the Home page, and can follow the Set up Microsoft 365 Business Premium in the setup wizard steps to protect files and mobile devices.

You can also complete these steps on the Devices page:

  1. In the admin center, in the left nav, go to Devices > Policies.

  2. On the Device policies page, choose Add.

  3. In the Add policy pane give the policy a name, and then choose a Policy type from the drop-down.

    You can set up application policies for protecting files on Android and iPhone devices, as well as Windows 10, and you can set up device configuration policies for company owned Windows 10 devices. See the following links for details:

  1. Once you set up policies, you and your employees can set up devices:
  • See Set up Windows devices for Microsoft 365 Business Premium users for steps for Windows devices.

  • See Set up mobile devices for Microsoft 365 Business Premium users for steps for Android phones and iPhones.

Mailbox Size

Office 365 Business Premium

Microsoft 365 Business Premium has a 50 GB storage limit as it uses Exchange Online Plan 1. While migrating to Microsoft 365 Business Premium, if any of your users exceed 50 GB of mailbox storage, it is recommended that you assign this user an Exchange Online Plan 2 and remove the Exchange Online Plan 1 as it's not feasible to assign both.

Threat protection

After migrating to Microsoft 365 Business Premium, you have Defender for Office 365. See Microsoft Defender for Office 365 for an overview. To set up, see set up Safe Links, set up Safe Attachments, and set up Anti-phishing in Defender for Office 365.

Sensitivity labels

365 Business Premium

To start using sensitivity labels, see Overview of sensitivity labels and create and manage sensitivity labels video.