
Microsoft 365 Exchange mailboxes are increasing their capacity from 50 GB to 100 GB for multiple business licenses. This improvement lets organizations store more emails, documents, and communications without having to buy extra licenses just because of lack of space.
Microsoft has carried out an update to its plans Microsoft 365 incorporating new capabilities related to storage, security, and artificial intelligence. Among the most relevant changes for companies is the increase in mailbox size Exchange Online, which go from 50 GB a 100 GB in several licenses.
This improvement responds to a common need for many organizations: having more space to manage corporate email, keep communication history, and reduce maintenance tasks associated with mailboxes that are close to their limit.
In addition to the storage increase, Microsoft adds new security features and related improvements Copilot Chat, reinforcing the value of current Microsoft 365 licenses.
What's changing in Microsoft 365 Exchange mailboxes?
So far, many Microsoft 365 business licenses included a main 50 GB mailbox per user.
With this update, Microsoft increases this capacity by an additional 50 GB, reaching:
100 GB of storage in Exchange Online
This change primarily affects:
- Microsoft 365 Business Basic
- Microsoft 365 Business Standard
- Microsoft 365 Business Premium
For users, this means having twice the space to manage:
- Emails.
- Attached files.
- Communications with clients and suppliers.
- Project histories.
- Business documentation.
Why is it important to have a 100 GB Exchange mailbox?

Email is still a key tool for the daily activity of many companies.
Although there are currently collaborative tools like Microsoft Teams or SharePoint, email continues to be a key channel for business communications, contracts, invoices, proposals, and client follow-ups.
An increase in mailbox storage brings several advantages.
Fewer problems due to lack of space
When a mailbox reaches its limit, users might have trouble sending or receiving emails.
With 100 GB of storage, this situation is considerably reduced and more room for growth is offered.
Greater capacity to preserve historical sites
Many organizations need to keep old emails for business, operational, or compliance reasons.
Having more storage makes it easier to keep important information without constantly having to go through manual filing processes.
More productivity for users
Employees can focus on their daily tasks without spending time cleaning out inboxes or managing old messages.
Especially in profiles like:
- Address.
- Sales department.
- Customer service.
- Administration.
- Human resources.
Mail usually accumulates large volumes of information.
Which Microsoft 365 licenses get the storage increase?

The mailbox expansion is part of a broader update to Microsoft 365 plans.
Microsoft 365 Business Basic and Business Standard
These licenses include:
- Increase the Exchange Online mailbox from 50 GB to 100 GB.
- URL protection at the moment of the click to improve security against malicious links.
- Improvements in Copilot Chat.
These improvements bring more capacity, greater protection, and new productivity possibilities through artificial intelligence.
Microsoft 365 Business Premium
Microsoft 365 Business Premium also gets:
- +50 GB of additional email storage.
- Improvements in Copilot Chat.
Also, it keeps its advanced security and management features for businesses that need extra protection.
Other improvements included in the Microsoft 365 update

Although the increase in Exchange mailboxes is one of the most noticeable changes for users, Microsoft also adds new features in other plans.
Microsoft 365 F1 and Microsoft 365 F3
These licenses include:
- Improvements in Copilot Chat.
- New associated analytics capabilities.
Microsoft 365 E3
Microsoft 365 E3 adds new security and management capabilities:
- Microsoft Defender for Office 365 Plan 1.
- Intune Advanced Analytics.
- Intune Plan 2.
These improvements help strengthen the protection of email, devices, and users.
Microsoft 365 E5
The most advanced license includes additional features such as:
- Microsoft Security Copilot.
- Intune Endpoint Privilege Management.
- Microsoft Cloud PKI.
- Intune Enterprise Application Management.
These features are aimed at organizations with greater security, governance, and advanced management needs.
How to make the most of the new Exchange Online storage

Although having more space is an important improvement, it is recommended to keep following good email management practices.
Some recommendations:
Check the mailboxes regularly
Analyzing which users have higher consumption allows you to detect specific needs and avoid future problems.
Apply proper retention policies
Microsoft 365 has tools to manage the information lifecycle and keep data according to the needs of each organization.
Combine Exchange with Microsoft Teams and SharePoint
Not all information should be stored in email.
For shared documents or team collaboration, solutions like SharePoint Online and Microsoft Teams offer a more suitable environment.
Microsoft 365 evolves with more capacity, security, and artificial intelligence
The increase of Exchange mailboxes from 50 GB to 100 GB is a direct upgrade for millions of Microsoft 365 users, especially for companies where email still plays a central role.
But this update goes beyond storage. Microsoft is beefing up its plans with new security and AI features, including improvements in Copilot Chat and advanced protection tools.
For companies, it's an opportunity to check if their current Microsoft 365 setup is ready to take advantage of all these new features.
Optimize your Microsoft 365 with ABD

At ABD Consulting and IT Solutions We help companies get the most out of Microsoft 365, from choosing the right licensing to advanced setup of services like Exchange Online, security, and Copilot.
We analyze the needs of each organization to make sure every user has the right tools, avoiding unnecessary costs and making the most of all available capabilities.
Do you want to know how this Microsoft 365 update affects your company? Contact our team and we'll check out your environment with no strings attached.