What is happening?
Microsoft may actively enforce stricter API throttling guidance.
Are you impacted?
For customers using Druva recommended configurations, you should not expect disruption or negative impact. This is an enforcement update, not a policy change. Druva’s architecture has built-in resilience since the past many years to handle the throttling effectively.
This guidance is a foundational principle of our work, and it is precisely why we architected our platform this way from the start.
The Druva Advantage: Built for the Cloud, Not for Workarounds
At Druva, we believe enterprise data protection shouldn't rely on unauthorized loopholes. Druva was architected from the ground up as a cloud-native SaaS platform, meaning our approach to Microsoft 365 backup goes far beyond brute-forcing API calls, as per Microsoft’s guidance.
Onboarding, Intelligent API Utilization & Dynamic Load Balancing
The rich dataset enables Druva to make proactive, data-informed decisions that optimize backup performance in real time. Here’s how that intelligence powers smarter backups.
a. Druva’s resilient infrastructure: The initial full backup (onboarding) is the most resource-intensive phase of protecting Microsoft 365. Microsoft responds with HTTP 429 (Too Many Requests) errors, severely throttling the connection and causing initial backups to take weeks or even months. Druva takes a fundamentally different, cloud-native approach to ensure your onboarding is fast, seamless, and throttling-free using Elastic Cloud Infrastructure. Because Druva is a 100% SaaS platform built on AWS, our backend automatically scales compute resources up during your initial onboarding to ingest data concurrently.
b. Intelligent scheduling: By analyzing peak and off-peak usage windows, Druva dynamically schedules backups at optimal times to reduce contention and avoid unnecessary throttling. For instance, more aggressive backup activity can be scheduled during off-business hours to make full use of available API bandwidth.
c. Optimized API utilization: Druva continuously tracks its own apps and Microsoft 365 API consumption to optimize its usage in real-time. If a threshold is being approached, Druva intelligently reduces or pauses non-critical operations — such as estimation jobs — to preserve quota for essential backup or restore tasks.
d. Smart Algorithm: To conserve API quota and speed up operations, Druva’s Smart Backup feature automatically detects the change. This significantly reduces unnecessary API consumption while still meeting data protection policies.
e. Intelligent retry and backoff (honoring Retry-After): When Microsoft returns throttling responses, Druva backs off and retries using the recommended wait interval where provided. This aligns with Microsoft’s recommended recovery pattern for Graph API usage.
f. Checkpoint and auto-resume: Druva checkpoints progress and resume from the last safe point after a throttling pause, reducing restart behavior and lowering repeated API calls.
g. Visibility for administrators: Where applicable, Druva provides visibility and notifications when throttling materially impacts job runtimes, so admins understand why completion time changed.
Bottom Line: While the rest of the backup industry is scrambling to update their code and warning customers about longer backup windows, Druva continues to scale effortlessly. Through a combination of intelligent API management, Druva ensures your critical Microsoft 365 data is fully protected without skipping a beat.