5 Key Factors to Consider When Choosing a Microsoft 365 Enterprise Plan

Before choosing a plan, it is important to understand how Microsoft 365 can support your business and which capabilities your organization actually needs. Microsoft 365 has become a core workplace platform for organizations of all sizes.

Microsoft reported more than 430 million people using Microsoft 365 apps in December 2025, highlighting the scale of its enterprise ecosystem.

With several enterprise licensing options available, choosing the right plan is not simply about picking up the package with the most features. Your decision should reflect your users, security requirements, compliance needs, IT environment, and budget.

This guide covers five key factors to help you evaluate Microsoft 365 enterprise plans and choose an option that fits your organization.

What Are Microsoft 365 Enterprise Plans?

Microsoft 365 enterprise plans are subscription packages designed for organizations that need productivity applications alongside enterprise-grade security, device management, compliance, and identity capabilities.

The main enterprise suites include Microsoft 365 E3 and Microsoft 365 E5, while Microsoft also offers Microsoft 365 E7, which became generally available in May 2026. E3 provides the core Microsoft 365 capabilities, while E5 adds more advanced security, compliance, analytics, and voice capabilities. E7 builds on E5 with Microsoft 365 Copilot, Microsoft Entra Suite, and Agent 365.

That range gives businesses flexibility, but it also makes plan selection more complicated. The best option depends on what your organization actually needs.

1. Assess Your Productivity and Collaboration Requirements

Start with the basics. Before comparing advanced security or compliance features, understand how employees use Microsoft 365 every day.

Most organizations rely on applications such as:

• Microsoft Word, Excel, PowerPoint, and Outlook
• Microsoft Teams for communication and meetings
• Exchange Online for business email
• SharePoint and OneDrive for file storage and collaboration
• Microsoft 365 apps across desktop, web, and mobile devices

Microsoft 365 E3 provides access to the core productivity capabilities that many enterprises need. E5 includes those capabilities along with additional enterprise features.

The important question is not whether a higher-tier plan has more applications. It is whether your employees will use those additional capabilities.

For example, a company with standard collaboration requirements may find E3 sufficient. A business with advanced security operations, data governance, analytics, or communication requirements may get more value from E5.

Questions to ask

• Which Microsoft 365 applications do employees use most?
• Do users need desktop applications or mainly browser-based access?
• How much collaboration happens through Teams and SharePoint?
• Do employees work across multiple devices?
• Do different user groups have different requirements?

A clear view of these requirements can prevent your organization from paying for capabilities that provide little practical value.

2. Compare Security and Identity Requirements

Security is one of the biggest differences between Microsoft 365 enterprise plans.

Every Microsoft 365 subscription includes baseline security capabilities, but organizations with more complex threat environments may require additional protection. Microsoft 365 E5 includes more advanced security capabilities across areas such as identity, endpoint protection, email security, and threat detection.

For example, Microsoft 365 E3 includes Microsoft Entra ID Plan 1, while E5 includes Entra ID Plan 2. E5 also provides more advanced security capabilities through the Microsoft Defender portfolio.

This distinction matters for organizations with:

• Large or distributed workforces
• Remote and hybrid employees
• Strict identity and access requirements
• Sensitive business data
• Higher exposure to phishing and endpoint threats
• Dedicated security operations teams

Your evaluation should therefore go beyond asking, “Which plan has better security?”

Instead, ask, “Which security capabilities do we need, and what would it cost to obtain them separately?”

That approach gives you a clearer view of the actual cost of each option.

3. Look at Compliance and Data Governance Needs

Security protects your environment from threats. Compliance helps you control how business information is stored, accessed, classified, and managed.

This becomes particularly important for organizations that handle financial records, customer information, intellectual property, employee data, or other sensitive content.

Microsoft 365 provides compliance capabilities through Microsoft Purview. E3 provides a core set of compliance and information protection capabilities, while E5 offers more advanced Purview functionality.

Your compliance assessment should consider areas such as:

• Data classification
• Sensitivity labels
• Data loss prevention
• Retention policies
• Audit requirements
• eDiscovery
• Insider risk management
• Regulatory requirements

A useful way to approach this decision is to map your business requirements to specific Microsoft capabilities.

For example, if your organization only needs basic data classification and retention controls, E3 may meet your requirements. If your legal, security, or compliance teams need deeper investigation, advanced auditing, or broader information protection capabilities, E5 may be worth evaluating.

The key is to choose based on actual compliance obligations rather than assuming that the highest-tier license is automatically necessary.

4. Calculate the Total Cost, Not Just the License Price

License price is only one part of the cost of a Microsoft 365 deployment.

A lower-priced plan can become more expensive if your organization needs several additional licenses or add-ons to meet its security, compliance, or management requirements.

Microsoft allows organizations with Microsoft 365 E3 to add capabilities such as Defender and Purview suites. This means you can build a more customized licensing model instead of moving every user to E5.

Consider these costs when comparing Microsoft 365 enterprise plans:

• Base license cost
• Required security or compliance add-ons
• Additional applications
• Third-party security tools
• Migration and deployment
• User training
• Administration and support
• License management
• Future upgrades

User segmentation can also make a significant difference.

Not every employee necessarily needs the same license. For example, your security team may need advanced E5 capabilities while other employees may only require E3. A mixed licensing strategy can sometimes provide the right balance between functionality and cost.

A good comparison should therefore calculate the total cost of ownership, rather than comparing the per-user subscription price alone.

5. Plan for Scalability and Future Requirements

The plan that works today should not create limitations two years from now.

Microsoft continues to expand the capabilities available across its enterprise subscriptions. In 2026, Microsoft introduced E7 as a higher-tier option that combines E5 with Microsoft 365 Copilot, the Microsoft Entra Suite, and Agent 365.

This does not mean every organization should choose E7. It does mean your licensing decision should account for where your IT environment is heading.

Think about your roadmap for:

• Cloud adoption
• Hybrid work
• Endpoint management
• Security operations
• Data governance
• Business intelligence
• Microsoft 365 Copilot
• AI and agent governance
• Regulatory compliance

For example, an organization that expects its security requirements to increase may benefit from evaluating E5 early. A company preparing to deploy Copilot at scale should also examine whether its existing data governance and identity controls are ready for that transition.

The goal is not to buy every available capability today. It is to avoid selecting a plan that becomes restrictive as your business evolves.

Microsoft 365 E3 vs. E5 vs. E7: Which Direction Should You Take?

A simple way to approach the options is to think about them in terms of business requirements.

The exact capabilities and licensing conditions can change, so organizations should always verify the current Microsoft licensing documentation before making a purchase decision.

A Practical Checklist Before You Choose

Before finalizing a Microsoft 365 enterprise license, bring your IT, security, finance, and business teams into the same discussion.

Review these areas:

• Users: Who needs which applications and capabilities?
• Security: What threats and identity risks do you need to address?
• Compliance: Which regulations and data controls apply to your organization?
• Devices: How many devices and operating systems need management?
• Data: Where is sensitive information stored and shared?
• Budget: What is the total cost after add-ons and supporting tools?
• Roadmap: What capabilities will you need over the next two to three years?
• Licensing: Can different user groups work with different license levels?

This exercise can help you avoid two common mistakes: over-licensing every employee or choosing a lower tier that later requires several additional purchases.

Final Words

The choice among Microsoft 365 enterprise plans is ultimately a business decision, not just a licensing exercise.  E3 can provide a strong foundation for organizations that need enterprise productivity, collaboration, device management, and core security capabilities.

E5 becomes more relevant when advanced security, compliance, analytics, and identity requirements become a priority. E7 is designed for organizations that want to combine those capabilities with Microsoft 365 Copilot, Microsoft Entra Suite, and centralized agent governance.

The right choice starts with understanding your users, security posture, compliance obligations, total cost, and technology roadmap. Once those requirements are clear, comparing plans becomes much more straightforward.

For businesses that need help evaluating Microsoft 365 licensing, migration, security, or ongoing management, ZNet can help assess the existing environment and identify a Microsoft 365 approach that aligns with business and IT requirements. This can make the transition to the right enterprise plan more structured, cost-conscious, and easier to manage.