Description
This article explains the steps you may need to take due to Microsoft's recently announced deprecation of Exchange Web Services (EWS).
Microsoft is updating how third-party applications connect to Microsoft Exchange Online. Starting 1 October 2026, Microsoft will block specific older connection methods.
NinjaOne SaaS Backup has already been updated to align with this change. Affected organisations are now required to reauthorise their Microsoft 365 (M365) instances no later than 2026-06-01, ahead of Microsoft's enforcement date.
This deadline ensures service continuity and minimises disruption. We do not anticipate that these changes will impact your data security, backup schedules or cause data loss.
What You Need to Know
Email restore or migration may be temporarily unavailable until you reauthorise your clients' M365 domain. If this change impacts your clients, a notification banner will appear in the NinjaOne SaaS Backup End-User Portal to guide you through the reauthorization process. You only need to take the required action once to ensure that restore and migration features continue to function normally. All other features will remain unchanged.
Reauthorising an M365 Domain
1. Log in to the NinjaOne SaaS Backup End-User Portal.
2. In the Permission Update Required dialog box, click Review Impacted Domains.
Alternatively, from the Dashboard page, you can click the Review Impacted Domains link in the Permission Update Required banner. NinjaOne will redirect you to Account Settings → Credentials.
3. Click Re-Authenticate.
NinjaOne SaaS Backup will redirect you to the M365 landing page.
- Input the correct credentials and click Enter.
Monitor ClientsThat Require Reauthorisation
As a partner, you can view all of your customers with pending reauthorisations.
To do so, follow these steps:
- Log in to the NinjaOne SaaS Backup Partner Portal.
- In the Permission Update Required prompt, click the View Impacted Organizations button.
Alternatively, from the Dashboard page, you can click the Review Impacted Domains link in the Permission Update Required banner.
NinjaOne SaaS Backup will redirect you to the Organizations page, where any customers that require reauthorisation will display an ? icon in the Partner Name column of the organisations table
- Click the actions menu, then click Go to Credentials page.
Frequently-Asked Questions (FAQ)
What is changing with Microsoft Exchange Web Services (EWS)?
Microsoft is gradually retiring EWS and transitioning customers to Microsoft Graph as the supported access method for M365 email.
Has NinjaOne SaaS Backup updated its platform to support Microsoft Graph?
Yes. This change is part of Microsoft's long-term roadmap and does not indicate an issue with your NinjaOne SaaS backup service.
Does this change affect my NinjaOne SaaS backups or archives?
For most customers, no. There is no impact on backup or archive operations. Your data will continue to be protected as expected. Some customers will need to reauthorize M365 to avoid backup interruption.
I have multiple tenant backups. Can I complete reauthorisation once for all of them?
No. You must reauthorise each tenant backup individually.
Is anything broken or being deprecated on the NinjaOne SaaS Backup side?
No. This issue is due to a Microsoft platform transition. NinjaOne SaaS backup has already adapted to the supported access model and continues to operate normally.
Will this affect historical data or restore capabilities?
No. Historical data is not affected. Existing backups, archives, and restores will continue to work as expected. There will be no data loss associated with this change.
Why am I hearing about this issue now?
Microsoft is rolling out this transition in phases across tenants and license types. Most customers will not notice any change. We are proactively communicating only where action may be required.
Do I need to reconfigure anything in my environment?
You may need to reauthorize M365, but not all organizations will. This update affects a limited subset of organizations. NinjaOne will notify organizations that require reauthorization through their End-User Portal with detailed instructions. Organizations that do not receive a notification are not required to take any action.
How do I know if I need to take action?
You'll receive a notification in both the NinjaOne SaaS Backup Partner Portal and the End-User Portal if an organiation needs to take action. If you don't receive a notification, your account is not currently impacted by this issue.
What happens if I receive a notification but don't take any action?
If you receive a notification but do not take action, email restore and migration features will be temporarily unavailable until you reauthorise. During this time, NinjaOne SaaS Backup will also alert you via the Organization Details page.
Where can I learn more about Microsoft's announcement?
Microsoft has shared additional details publicly about the EWS retirement and the move to Microsoft Graph. You can reference Microsoft's announcement at: Retirement of Exchange Web Services in Exchange Online.