Hi Vincent, I don't think that the OP's question was vague at all. In any event the maximum licences for M365 Business Basic (Identity, access, and user management for up to 300 employees) and M365 Business Standard (Everything in Business Basic, plus:) and Microsoft 365 Business Premium is (Everything in Business Standard, plus). Compare Microsoft 365 Plans | Microsoft 365 And the OP specifically asked: "How many users can be licensed on one MS 365 Business Premium License?" AND the answer is 300.

Hello Kamil Imiołek**,**

Good day! Thank you for reaching out to Microsoft community.

As per your description and my understanding, you’re attempting to verify a Microsoft Nonprofit account in the UK but are unable to complete the process. Despite trying various verification methods, including mobile numbers, landlines, WhatsApp, and texting, none have successfully worked.

This is what Microsoft 365 Business Premium license covers:

• Access to the security console: Yes, Microsoft 365 Business Premium provides access to the Microsoft 365 security center, where you can manage security settings and monitor security alerts.
• Notifications of events and incidents in the security panel: Yes, you can receive notifications of security events and incidents.
• Anti-virus scanning options: Yes, Microsoft 365 Business Premium includes Microsoft Defender for Office 365, which provides anti-virus and anti-malware protection.

This is what Microsoft 365 Business Premium license Do not cover:

• Automated investigation capabilities: No, automated investigation and response capabilities are typically part of Microsoft Defender for Endpoint, which is included in Microsoft 365 E5.
• Viewing endpoint processes: No, this feature is part of Microsoft Defender for Endpoint, which is included in Microsoft 365 E5.
• Custom detection rule creation: No, creating custom detection rules is a feature of Microsoft Defender for Endpoint, included in Microsoft 365 E5.
• Integration with external SIEM systems: No, integration with external Security Information and Event Management (SIEM) systems is typically available with Microsoft 365 E5.
• KQL query formulation: No, KQL (Kusto Query Language) query formulation is available with Microsoft 365 E5, which includes advanced threat hunting capabilities.
• Endpoint network isolation: No, this feature is part of Microsoft Defender for Endpoint, included in Microsoft 365 E5.

For your reference:

• Microsoft 365 Business Premium | Microsoft 365.
• Microsoft 365 for enterprise overview - Microsoft 365 Enterprise | Microsoft Learn.

I hope this helps. Let me know if you have any further questions or concerns.

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Looking forward to your response and have a great day ahead!!

Sincerely

S M Nazmun Nur | Microsoft Community Moderator