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Microsoft 365 Business Premium Device Limits and Email Address Guide
Question details
Clarification on the number of devices each user can install Microsoft 365 on and the format of user email addresses with or without a custom domain.
- Product
- Microsoft 365 Business Premium
- Device & OS
- not provided
- Scenario
- A nonprofit organization received donated licenses and needs to understand deployment allowances and email setups for its users.
- Observed behavior
- Needs specific guidelines on installation limits per user and how the tenant assigns default vs. custom domain email addresses.
Ensure you have global admin access to your Microsoft 365 Admin Center to verify your current active licenses and manage domain configurations.
Understanding Device Limits and Email Address Formats
This outlines the exact hardware installation limits per licensed user and explains how email domains are structured.
Microsoft 365 Business Premium offers generous installation limits across multiple platforms for each assigned user license.
Your organization's email format will depend on whether you have verified your own registered domain within the Microsoft 365 Admin Center.
Each user assigned a Microsoft 365 Business Premium license can install the Office desktop and mobile apps on up to 5 PCs or Macs, 5 tablets, and 5 smartphones simultaneously.
If your organization has not linked a custom domain, Microsoft assigns a default routing domain. User email addresses will follow the format: user@yourorganization.onmicrosoft.com.
If you verify a custom domain (e.g., yourdomain.com) in the Microsoft 365 Admin Center, you can assign professional email addresses to your users using the format: user@yourdomain.com.
Simplify Your Workflow with WPS Office
Managing subscription limits and assigning licenses across numerous devices can be challenging. WPS Office provides a free, lightweight, and incredibly intuitive alternative to Microsoft Office, delivering powerful tools for document creation without restrictive device installation limits.
- 1. Download the software: Visit the official WPS Office website and download the free installation package for your operating system.
- 2. Install and launch: Run the installer, follow the on-screen prompts, and open the application to access Writer, Spreadsheets, and Presentation.
- 3. Open existing documents: Simply drag and drop your existing Word, Excel, or PowerPoint files into WPS Office to continue working without formatting issues.
Frequently Asked Questions
How can a user deactivate an Office installation on an old device?
Users can sign in to their Microsoft account portal, navigate to the 'Apps & Devices' section, and choose to sign out of Office on specific devices to free up installation slots for new hardware.
Can I have multiple custom domains in one Microsoft 365 tenant?
Yes, you can add and verify multiple custom domains in the Microsoft 365 Admin Center. You can then choose which domain to use for each user's primary email address.
Do shared devices count against the 5-device limit?
If you configure Shared Computer Activation (often used in computer labs or shared workspaces), the installation does not count against a single user's 5-PC limit.
What happens to the Office apps if I remove a user's license?
If a license is unassigned, the Office applications installed by that user will enter reduced functionality mode. They can view and print documents, but editing and creating new documents will be disabled.
