500 GBs of data inaccessible on 365 for Nonprofits

I manage a U.S. nonprofit that was using Microsoft 365 Business Premium through Microsoft’s nonprofit grant program.

About a week ago, we suddenly lost access to our Microsoft 365 services. After investigating, I learned that Microsoft had announced the discontinuation of the Business Premium grant program. However, we never received any notification that our grant was ending or that our services would be terminated.

What makes this especially confusing is that we continued receiving Microsoft’s regular invoices showing Business Premium licenses with a $0 balance as recently as May 21, 2026.

The most serious issue is that approximately 500 GB of organizational data stored in OneDrive is now inaccessible.

We have:

• Searched our email records and cannot find any termination notice.
• Opened support cases with Microsoft: no success in resolving the issue through regular recovery options.
• Asked for recovery options thru escalation paths: no response yet.

Questions:

1. Has anyone gone through a similar nonprofit grant termination?
2. Does Microsoft retain OneDrive data for a period after nonprofit license termination?
3. Are there escalation paths beyond frontline support for data recovery?
4. Has anyone successfully regained access to a tenant after a grant-related shutdown?

Any advice or experiences would be greatly appreciated.