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🚀 Upcoming Change: Transition from Exchange Web Services (EWS) to Microsoft Graph API

Forum|Forum|1 month ago
October 30, 2025
3 replies
251 views

+5

Arvind
Vaulter

Microsoft has announced that Exchange Web Services (EWS) will be fully retired in October 2026. This means all integrations currently using EWS — including Commvault Exchange Online operations — will need to transition to the Microsoft Graph API before that date.

🧭 What This Means for Commvault Users

Our Engineering and Development teams are already working to ensure a seamless migration of all Exchange-related functionality from EWS to Graph.

Target rollout: Summer 2026
Status: In development

You can continue to use existing EWS-based functionality for now. We’ll provide detailed configuration guidance and compatibility notes closer to the rollout.

💡 Why This Matters

The move to Microsoft Graph represents a significant shift in how Exchange data is accessed and protected. Commvault remains committed to delivering uninterrupted backup and recovery operations for Exchange Online as Microsoft evolves its API ecosystem.

📣 Stay Updated

Keep an eye on future announcements in this community for rollout details and transition guidance.

For the latest updates and official notices, check:

🔗 Commvault Software Announcements
🔗 Deprecation Notices

And for Microsoft’s official statement:

🔗 Microsoft Tech Community Blog
🔗 Microsoft Learn Article

+16

dude
Byte
Forum|Forum|1 month ago
October 30, 2025

@Arvind thanks for sharing that with us.

We currently still have Exchange On-Prem Backups. Do you know if this change to MS Graph API will change in any way the overall infrastructure needed to maintain Backups from Exchange (Access Nodes, WebServer, Index Servers etc) or that will remain the same? Just looking for some additional details.

https://documentation.commvault.com/2024e/commcell-console/exchange_mailbox_agent_architecture_user_mailbox_and_journal_mailbox.html

Thank you

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+5

Arvind
Author
Vaulter
Forum|Forum|1 month ago
October 30, 2025

Hey @dude — love the name, by the way 😉

Short answer: There are no changes to your Commvault infrastructure.

The move from EWS to Microsoft Graph only changes how Exchange data is accessed, not your overall architecture.

Your existing components — Access Nodes, Web Server, Index Server(s), and Media Agents — remain the same.

This is purely an API transition, where we’ll use Microsoft Graph instead of EWS for Exchange Online operations.

Just make sure you’re running the latest Commvault Feature or Maintenance Release [As it's released], which includes the new Graph API integration.

- Cheers, Arvind

S