CoPilot usage limits

Question

Does Copilot Premium e5 have hourly restrictions on usage or fair usage restrictions

Answer 1

Copilot usage is governed by a combination of feature limits and capacity/credits rather than a simple “unlimited” model, and limits can vary by plan and feature.

For Microsoft 365 plans with Copilot (including E5-based offerings), the following apply based on the provided information:

1. Feature limits and AI credits
   AI features (such as Actions, Vision, image generation, etc.) have usage caps (“feature limits”) and monthly AI credits. These caps are designed to ensure fair usage across users and can differ per feature and per plan. Limits may change over time and can vary based on system conditions and the specific entry point used.
2. Security Copilot capacity (for E5/E7 inclusion)
   For tenants using Security Copilot via Microsoft 365 E5/E7 inclusion, usage is constrained by Security Compute Units (SCUs), which are pooled capacity for the tenant:
   • 400 SCUs per month for every 1,000 paid user licenses, up to 10,000 SCUs/month.
   • This default capacity is tenant-wide, shared across all users and experiences, and not billed hourly.
   • It is an inclusion capacity model, not a per-hour entitlement.
3. API and service throttling
   For Microsoft 365 Copilot APIs, Microsoft explicitly enforces throttling and quota limits. Requests may be rate-limited or rejected to protect service reliability and ensure fair usage. Limits can be per-user, per-tenant, or per-API and may be adjusted at any time. Attempting to circumvent these limits is prohibited.
4. No explicit “hourly” limit documented in the context
   The provided documentation does not define a fixed “hourly usage limit” for Copilot Premium/E5. Instead, it describes:
   • Monthly capacity (e.g., SCUs for Security Copilot inclusion).
   • Per-feature limits and AI credits that can vary by plan and feature.
   • Throttling and quota enforcement at the API/service level.

In practice, this means:

• There are fair usage controls (feature limits, credits, SCU capacity, and throttling), but not a simple published “X requests per hour” rule in the provided material.
• High-volume or burst usage can be throttled, and overall usage is constrained by the applicable capacity model (SCUs, AI credits, feature limits).

To see current limits for a specific subscription, check the plan’s AI credits/feature limits page or the tenant’s Security Copilot capacity configuration, as applicable.

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References:

• Learn about Security Copilot for Microsoft 365 E5 and E7 included customers
• AI credits and limits for Microsoft 365 Personal, Family, and Premium
• Manage Copilot usage and models
• Microsoft 365 Copilot APIs Terms of Use (preview)