Microsoft has announced upcoming changes to Exchange Online, and NinjaOne has proactively prepared to ensure continuous backup protection for Microsoft 365 customers.
This update is important for all partners and customers using NinjaOne SaaS Backup with Exchange Online.
What’s Changing
Microsoft plans to retire Exchange Web Services (EWS) and moving to Microsoft Graph APIs for Exchange Online in October 2026.
- NinjaOne has already prepared for this change
- Backup coverage for customer data will continue uninterrupted
- NinjaOne is working closely with Microsoft to ensure a smooth transition
⚠️ Important: This change applies only to Microsoft 365 / Exchange Online
❌ On‑premises Exchange Server is NOT impacted
Why Microsoft Is Making This Change
Following the Midnight Blizzard security incident in 2024, Microsoft accelerated efforts to:
- Improve security posture
- Remove legacy EWS dependencies
- Enforce modern authentication and least‑privilege access
As part of this shift, Microsoft is moving services from EWS to Microsoft Graph APIs.
NinjaOne’s engineering and product teams have collaborated closely with Microsoft throughout this process to align with these modern security standards.
How NinjaOne Is Responding
NinjaOne is:
- Migrating all backup functionality from EWS to Microsoft Graph APIs
- Aligning with modern authentication patterns
- Maintaining a secure, reliable backup experience
- Ensuring no loss of features during the transition
What to Expect Next
No action is required right now
However, to maintain authentication and backup access:
Mandatory Action Before June 2026
- All Microsoft 365 tenants will be required to re‑authorize NinjaOne to provide Microsoft Graph access
- This ensures continued authentication once EWS is fully retired
What you may see
- A banner notification inside the NinjaOne portal if re‑authorization is required
- A pop‑up prompt on login guiding you through the re‑authentication process
If this is not completed before the deadline, backup authentication may be impacted.
Frequently Asked Questions
Does this affect on‑premises Exchange Server?
No. This change applies only to Exchange Online.
Will all EWS features still be available?
Yes. NinjaOne plans to migrate all existing functionality to Microsoft Graph APIs.
Will app re‑authorization be required?
Not at this time. NinjaOne will notify partners and customers in advance if action is required.
What Partners Should Do Now
- Be aware of the upcoming EWS retirement (October 2026)
- Inform customers that backup continuity is already covered
- Prepare customers for mandatory re‑authorization before June 2026
- Reassure customers that NinjaOne is fully aligned with Microsoft’s security roadmap
