Microsoft offers a lot of email and productivity options, and the difference between two of the most common entry-level plans is not always obvious. Exchange Online Plan 1 and Microsoft 365 Business Basic both give you hosted business email, and both cost under $10 per user per month. So what do you actually get for the extra money with Business Basic, and when does the cheaper Exchange-only option make more sense?

The Short Answer

Pricing at a Glance

Both are billed annually through Microsoft or a licensing partner. The $2–$3 gap is modest per user, but across a 20-person team it adds up to $480–$720 per year depending on timing. Whether that is worth it depends entirely on what your team actually uses.

What Exchange Online Plan 1 Includes

Exchange Online Plan 1 is a standalone hosted email service. Here is what you get:

• Hosted Exchange email with your own domain (e.g., [email protected])
• 50 GB primary mailbox per user
• 50 GB archive mailbox per user
• Outlook on the web (browser-based access)
• Exchange Online Protection for spam and malware filtering
• Calendar and contacts sync
• Mobile email access

What it does not include: Teams, OneDrive storage, SharePoint, or any Office apps — web-based or otherwise. It is built for one purpose, and it does that one thing well.

What Microsoft 365 Business Basic Adds

Business Basic includes everything in Exchange Online Plan 1 and layers on top of it:

• Microsoft Teams for chat, video calls, and virtual meetings
• 1 TB of OneDrive storage per user for file sync and sharing
• SharePoint for team-level document libraries and internal sites
• Web and mobile versions of Word, Excel, PowerPoint, and Outlook
• Microsoft Bookings, Planner, Forms, and other Microsoft 365 apps
• Admin controls through the Microsoft 365 admin center

The email experience is identical between the two plans — same 50 GB mailbox, same spam filtering, same custom domain setup. Business Basic simply layers a broader productivity platform on top.

Side-by-Side Comparison

The Detail Most People Miss: Neither Plan Includes Desktop Outlook

This is the most common source of confusion. Neither Exchange Online Plan 1 nor Business Basic includes the full desktop version of Outlook, Word, Excel, or PowerPoint.

Business Basic includes the web and mobile versions of Office apps. If someone on your team needs the full installed Outlook application on Windows or Mac, they will need a plan that includes desktop app rights — such as Microsoft 365 Business Standard or Business Premium.

When Exchange Online Plan 1 Is the Right Choice

Exchange Online Plan 1 is not just a budget cut — in the right situation, it is the better fit:

• Your team already uses a separate collaboration platform (Google Workspace, Slack) and only needs Microsoft-hosted email.
• You are licensing desktop Office apps through a separate agreement and only need the Exchange mailbox component.
• You have users who only need a mailbox — shared service accounts, equipment mailboxes, or part-time staff with very limited IT needs.
• You want to mix license types within a larger tenant, giving Exchange-only mailboxes to lower-activity users and Business Basic or higher to everyone else.

Microsoft explicitly allows you to combine standalone plans like Exchange Online Plan 1 with Business plans in the same tenant. This mixed licensing approach is often the smartest financial move for businesses with varied user needs.

When Business Basic Is the Better Choice

Business Basic makes sense when your team actually uses the tools that come with it:

• You want a single subscription covering email, file storage, video meetings, and basic productivity without managing multiple vendors.
• Your team communicates through Microsoft Teams and wants that included rather than added separately.
• You store and share files in OneDrive or SharePoint and want those services under one license agreement.
• You use web-based Office apps for document creation and do not require the full installed suite.

For most small and mid-size businesses in the 10 to 300 user range, Business Basic is the more practical starting point. The difference in cost is well worth it when the alternative is piecing together separate tools.

A Practical Example: Mixing Both Plans in One Tenant

Here is a real-world scenario we see fairly often. A professional services firm has 18 employees — 12 active staff who use Teams daily, collaborate in SharePoint, and store files in OneDrive, and 6 part-time coordinators who only send and receive email.

Rather than licensing everyone at Business Basic, the firm puts the 12 active users on Business Basic and the 6 part-time users on Exchange Online Plan 1. The email-only users cost less, and nobody loses access to anything they actually need.

Microsoft supports this kind of mixed licensing within a single tenant. It is one of the most underutilized ways to keep licensing costs reasonable without compromising on what your team actually needs.

Frequently Asked Questions

Bottom Line

Both plans give you the same hosted business email experience — same mailbox size, same spam filtering, same custom domain setup. The decision comes down to one question: does your team need more than email?

If the answer is yes — and for most businesses it is — Business Basic is a straightforward choice. It delivers email, Teams, OneDrive, SharePoint, and web Office apps in a single subscription. If the answer is no, or if you are mixing license types within a larger tenant, Exchange Online Plan 1 is a lean, purpose-built option that does exactly what it says.

If you are not sure which plan fits your setup, or you want to review whether your current licensing is structured efficiently, Urban IT can take a look. We help businesses across Ventura County and greater Los Angeles manage their Microsoft 365 environments — and we are happy to walk through your options without any pressure. Talk to Urban IT →