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Microsoft Exchange Online
Microsoft Exchange Online · Redmond, Washington, United States · founded 1975
What it is
Microsoft Exchange Online is a paid, hosted email and messaging service for business users. It provides email, calendars, and contacts through the web, Android, iOS, and macOS, as well as Windows. Organizations administer it in the web-based Exchange admin center. Mailboxes include anti-spam and anti-malware filtering, while data loss prevention helps reduce accidental disclosure of sensitive information. Outlook integration supports offline access. Administrators can require mobile PIN locks and remove company data from lost phones. Compliance tools include litigation holds, inactive mailboxes, auditing, retention policies, and message encryption. Microsoft states a financially backed 99.9% uptime service level agreement and lists IT phone support 24 hours a day, seven days a week. Plan 1 provides 50 GB primary and archive storage with 150 MB messages. Plan 2 provides 100 GB primary and 1.5 TB archive storage, adds built-in data loss prevention and Cloud Voicemail, and supports the same message size. Shared mailboxes and migration tools are available.
For and against
For
- Business email, calendar, and contacts
- Anti-spam and anti-malware filtering
- Offline access through Outlook integration
- Mobile data removal policies
- Compliance and retention features
Against
- Paid service with no free plan
- Plan 1 mailbox storage is 50 GB
- Plan 2 features require the higher plan
The verdict
Exchange Online combines hosted business messaging with administration, security, mobile controls, and compliance features. Buyers should compare the two plans’ storage and added capabilities, then request pricing.
Who it suits
It suits businesses needing hosted email, calendars, contacts, administration, and compliance controls across major devices. Organizations needing mobile controls, offline Outlook access, or shared mailboxes may also find the listed capabilities relevant.
Plans and prices
Exchange Online (Plan 1)
50 GB mailbox storage · messages up to 150 MB · no device limit
Read 11 Oct 2026 · microsoft.com
Exchange Online (Plan 2)
100 GB mailbox storage · messages up to 150 MB · 1.5 TB archive
Read 11 Oct 2026 · microsoft.com
On the record
- Administration
- Organizations can manage Exchange Online through the web-based Exchange admin center.microsoft.com · read 11 Oct 2026
- Business use
- Microsoft describes Exchange Online as a hosted email service and messaging solution for business users.microsoft.com · read 11 Oct 2026
- Compliance
- Exchange Online supports litigation holds, inactive mailboxes, data loss prevention, auditing, retention policies, and message encryption.learn.microsoft.com · read 11 Oct 2026
- Data safeguards
- Microsoft says data loss prevention capabilities help prevent users from mistakenly sending sensitive information to unauthorized people.microsoft.com · read 11 Oct 2026
- Mobile security
- Mobile device policies can enforce PIN locks and remove company data from lost phones.microsoft.com · read 11 Oct 2026
- Outlook integration
- Microsoft says Outlook integration provides a familiar email experience with offline access.microsoft.com · read 11 Oct 2026
- Plan 1 limit
- Plan 1 includes a 50 GB mailbox and supports messages up to 150 MB.microsoft.com · read 11 Oct 2026
- Plan 2 features
- Plan 2 adds built-in data loss prevention and Cloud Voicemail services with call answering, dial-in UI, and an automated attendant.microsoft.com · read 11 Oct 2026
- Purpose
- Exchange Online is hosted email for business, with email, calendar, and contacts accessible across major browsers and devices.microsoft.com · read 11 Oct 2026
- Reliability
- Microsoft states that Exchange Online has a financially backed 99.9% uptime service level agreement.microsoft.com · read 11 Oct 2026
- Spam and malware protection
- Built-in security capabilities include anti-malware and anti-spam filtering for mailboxes.microsoft.com · read 11 Oct 2026
- Support
- The Exchange Online product page states that IT-level phone support is available 24 hours a day, 7 days a week.microsoft.com · read 11 Oct 2026
