@Garry Thanks for posting in our Q&A. For this issue, it is not related to windows 365. It is related to Microsoft 365.

For this issue, I have done a lot of research. I find that this article compare something between Microsoft 365 Business Premium and Microsoft 365 E3/E5 in the official article.
https://learn.microsoft.com/en-us/office365/servicedescriptions/office-365-platform-service-description/office-365-plan-options#service-availability-within-each-microsoft-365-and-office-365-plan

With the limitation resource, if you want to get more accurate help, it is suggested to refer to the following link to get support:
https://learn.microsoft.com/en-us/microsoft-365/business-video/get-help-support?view=o365-worldwide

Hope it will help.


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Answer from Lu Dai-MSFT on learn.microsoft.com
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Reddit
reddit.com › r/microsoft365 › office 365 e3 vs microsoft 365 business premium
r/microsoft365 on Reddit: Office 365 E3 vs Microsoft 365 Business Premium
August 8, 2024 -

Greetings all! I've been chatting with a person who works at a company with approx 40 users. At first they purchased M365 Business Standard licenses - then they switched all the users to Office 365 E3 as they thought it was required for an Accounting application - it wasn't.

So I feel that they will do better with M365 Business Premium as a good fit with SMB's - yes that will reduce that mailbox size from 100GB to 50GB but they're all well below 50GB and have archiving turned on.

Did a lot of research...comparing the features...also had a look here - mind you dated July 2023: https://m365maps.com/matrix.htm#010001000000000000000

Now the costs are comparable....as purchased those O365 E3 licenses before those recent license changes.

So I'm trying to point out the advantages of switching to M365 Business Premium.

My understanding is that M365 BP provides advanced security features and better device/app management and provides for a less complex environment to support. Thinking of their needs also on that side as their current IT folks are new to M365 (no comment!) ;-) ....so I am not always available to assist.

M365 Business Premium will also provide their Compliance and Governance needs when they're ready to go there.

Am I missing something here? Any there any other pro's associated with that M365 Business Premium subscription vs O365 E3?

Many thanks in advance!

Cheers!

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Microsoft Learn
learn.microsoft.com › en-us › office365 › servicedescriptions › office-365-platform-service-description › office-365-plan-options
Microsoft 365 and Office 365 plan options - Service Descriptions | Microsoft Learn
In the same service family: For example, you can move from Microsoft 365 Business Basic to Microsoft 365 Business Standard, or from Office 365 E1 to Office 365 E3.
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Interlink
interlink.com › blog › microsoft-365-e3-vs-business-premium
Microsoft 365 E3 vs Business Premium
January 17, 2024 - Microsoft knows that they must ... clients. If you have more than 300 users, then Microsoft 365 E3 is going to be the way to go as Microsoft will only allow you to license 300 users of Business Premium....
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Sherweb
sherweb.com › home › microsoft ecosystem › microsoft 365 › microsoft 365 business premium vs e3: which one is right for you?
Microsoft 365 Business Premium vs E3: which one is right for you? | Sherweb
September 29, 2025 - Microsoft 365 Business Premium: Streamlined productivity and security for small and medium businesses. Microsoft 365 E3: Comprehensive solution for Enterprises with advanced security and compliance needs.
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360 Visibility
360visibility.com › home › blog › microsoft office 365 › microsoft 365 business premium vs microsoft 365 e3
Microsoft 365 Business Premium vs Microsoft 365 E3
March 10, 2025 - Audio conferencing for up to 1,000 attendees: Microsoft 365 E3 includes the ability to host online meetings with up to 1,000 participants, and allow them to join by phone or by using the Teams app.
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FusionConnect
fusionconnect.com › blog › microsoft-365-business-premium-vs.-e3
Business Premium vs E3: Choose the Best Microsoft 365 Plan for Your Needs
1 week ago - It’s a smart option for IT teams ... territory. Microsoft 365 E3 is built for organizations that demand more from their Microsoft environment—more scalability, more control, and more compliance support....
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Codecreators
codecreators.ca › home › microsoft 365 business premium vs e3: a comprehensive guide
Microsoft 365 Business Premium vs E3: A Comprehensive Guide | Code Creators
January 8, 2025 - Microsoft 365 Business Premium is designed for small to medium-sized businesses and is limited to 300 users. This means that businesses with up to 300 employees can benefit from all the essential tools and features provided by Microsoft 365.
Find elsewhere
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Al Rafay Consulting
alrafayglobal.com › home › ssl certificate › microsoft 365 business premium vs. e3: a comprehensive guide to choosing the right plan for your business
Microsoft 365 Business Premium Vs. E3: A Comprehensive Guide To Choosing The Right Plan For Your Business | Al Rafay Global
July 3, 2025 - By adopting Business Premium, they ... at a reasonable price. Microsoft 365 E3 is a comprehensive suite tailored for large enterprises that require advanced security, compliance, and device management....
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Amaxra
amaxra.com › articles › microsoft-365-business-premium-vs-e3
Microsoft 365 Business Premium vs. E3 - The Ultimate Comparison Guide
May 30, 2023 - On the other hand, Microsoft 365 E3 targets larger enterprises and offers more sophisticated capabilities such as enhanced security and compliance monitoring and advanced data analytics capabilities.
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Next Perimeter
nextperimeter.com › home › endpoint management & optimization › microsoft 365 business premium vs e3, and one powerful tool in both that will revolutionize your it
Microsoft 365 Business Premium vs E3, & the Power of Intune
June 8, 2025 - Business Premium costs $22 per user per month and comes with a 50 GB mailbox storage limit and a 1 TB storage limit in OneDrive. Only 300 Business Premium licenses can be assigned to a company before it must begin purchasing enterprise plans.
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Relion
teamrelion.com › home › microsoft 365 business premium vs e3
Microsoft 365 Business Premium vs E3 - Relion - Business IT Support - Managed Technology Services
August 14, 2023 - The nitty gritty details can be found in the link below, but here’s the most significant difference: Business Premium comes with Windows 10 Pro / E3 comes with Windows 10 Enterprise
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Interlink
interlink.com › e3-vs-business-premium
Microsoft 365 E3 vs Business Premium Page
Microsoft knows that they must ... them than for their Enterprise clients. If you have more than 300 users, then Microsoft 365 E3 is going to be the way to go as Microsoft will only allow you to license 300 users of Business Premium....
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LazyAdmin
lazyadmin.nl › home › microsoft 365 business premium vs office 365 e3 – what you need to know
Microsoft 365 Business Premium vs Office 365 E3 - All Differences
September 4, 2023 - One of the differences that are ... get with the two plans. Microsoft 365 Business Premium comes with Microsoft 365 Apps for Business whereas Office 365 E3 gives you Microsoft 365 Apps for Enterprise....
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Inacom-sby
inacom-sby.com › home › microsoft 365 › choosing the right microsoft 365 license: business premium vs. e3
Choosing the Right Microsoft 365 License: Business Premium vs. E3 | Inacom Information Systems
July 31, 2024 - E3 users can pick supplemental licenses for these products, but I recommend they just opt for getting the E5 Bundle instead. Inacom offers free email migration services to all of our new Microsoft 365 clients. Why not by from someone who’s willing to help make the migration easy? ... Microsoft 365 Business Premium is designed for small to medium-sized businesses ...
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Andersontech
andersontech.com › home › using microsoft 365 business standard? premium or e3 may be a better choice
Using Microsoft 365 Business Standard? | Anderson Technologies
August 20, 2024 - Microsoft 365 Business Premium: ... 365 E3: E3 includes all features of Business Premium, with additional capabilities like advanced data analytics, enhanced compliance tools, and unlimited archiving....
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Spiceworks
community.spiceworks.com › software & applications
M365 E3 vs M365 Business Premium - Software & Applications - Spiceworks Community
June 2, 2021 - We’re a relatively small company of around 200 users, and we’re currently using M365 E3. I’m new to the company, and I’ve been doing a rundown of their Microsoft Licenses. I’ve been doing a comparison of the two in the Admin Portal and I’m having a tough time seeing the benefits of paying for M365 E3 because M365 Business Premium seems to be doing more, for a lot less money.
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SmartYou
smartyou.ch › en › microsoft-365-business-premium-vs-office-365-e3-how-they-compare
Microsoft 365 Business premium vs Office 365 E3: detailed comparison
June 6, 2025 - Microsoft 365 Business Premium ... ID. Microsoft Bookings for making appointments. ... Office 365 E3 focuses on productivity and compliance with Microsoft Purview level E3....
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Extrabux
extrabux.com › en › guide › 6976101
Microsoft 365 Business Premium vs. E3 vs. E5: Full Comparison & Verdict 2025 - Extrabux
Users can have these apps available on up to 5 phones and five tablets (iOS and Android). However, only Standard and Premium (Business) and E3 and E5 (Enterprise Office 365) also include desktop versions.