Starting in late January 2025, OneDrive is updating its storage policies for business and enterprise unlicensed accounts (Currently, Edu tenants excluded). After this policy change, any OneDrive accounts that have been unlicensed for more than 90 days will be automatically archived and become inaccessible to end users.

Accessing Archived Accounts:

Once the accounts are archived, you can access their files by enabling Unlicensed Account Billing in the Microsoft 365 admin center. Note that this billing applies to all unlicensed OneDrive accounts in your tenant:

• Storage Fee: $0.05/GB per month to store unlicensed accounts in the Microsoft 365 Archive.
• Reactivation Fee: $0.60/GB to reactivate accounts stored in the Microsoft 365 Archive.

Admin Actions:

• View Unlicensed Accounts: Navigate to SharePoint admin center > Reports > OneDrive accounts to view a list of unlicensed accounts in your tenant.
• Set Up Archive Billing: Establish archive billing for unlicensed accounts to access and edit archived files.
• Delete Unlicensed Accounts: If an unlicensed account does not have a retention policy applied, consider deleting it.
• Renew Unlicensed Accounts: Renew any unlicensed accounts you wish to maintain access to.

Source: MC836942