Microsoft A3 vs A5: Which Office 365 Plan Saves You More in 2024?
Microsoft A3 and A5 are the two highest education tiers of Office 365. A3 bundles core apps plus basic security; A5 adds advanced compliance, analytics, and phone calling.
IT teams often glance at the price list, see “Office 365” on both lines, and assume the gap is small. The trap: A5 hides a 90% premium that only surfaces once you need features like eDiscovery or Power BI Pro.
Key Differences
A3 gives Teams, SharePoint, 100 GB mailbox, and basic threat protection. A5 layers on Microsoft Defender P2, advanced eDiscovery, audio-conferencing, and Power BI Pro. Storage jumps to 100 GB plus unlimited archive.
Which One Should You Choose?
If you already pay for third-party security or BI tools, stick with A3 and save roughly $6 per user per month. If audits, litigation holds, or hybrid calling are daily realities, the A5 surcharge is cheaper than separate licenses.
Can A5 be mixed with A3 on the same tenant?
Yes. Assign A5 only to staff who need the extras, keeping the bulk on A3.
Is Microsoft Defender P2 included in A3?
No. A3 only offers the basic P1 version; P2 is exclusive to A5.
What happens if I downgrade later?
Data stays intact, but advanced features like Power BI Pro will prompt for new licenses.