Active Microsoft 365 E5 Developer tenant unexpectedly limited to 300 GB pooled storage

Question

I am requesting assistance regarding a storage limitation issue affecting my Microsoft 365 E5 Developer tenant.

My tenant has been active for several years and currently shows an active Microsoft 365 E5 Developer subscription with 25 licenses. The subscription status is Active and the expiration date is September 25, 2026.

However, SharePoint Admin Center is now displaying the following message:

"Trial-only tenants are limited to 300 GB of pooled storage."

The tenant is currently reported as being over the 300 GB storage limit, even though the Microsoft 365 E5 Developer subscription remains active.

This change appeared unexpectedly and is affecting existing OneDrive and SharePoint data that has been stored and used normally for years.

Based on the current licensing information, I do not understand why the tenant is being treated as a trial-only tenant with a 300 GB storage cap.

Answer 1

Hi @Tuyền Trương Thanh

Thank you for reaching out. 

First, I’d like to clarify that this is a user‑to‑user support forum. Moderators participating here do not have access to backend systems, nor can we directly intervene in Microsoft product functionality. Our role is limited to providing technical guidance and sharing best‑practice recommendations based on reported issues, requests, and scenarios.  

Based on my research, looks like this behavior may be related to the current storage entitlements documented for Microsoft 365 Developer Program subscriptions. From what I understand, the  Developer subscriptions may be subject to a 300 GB pooled tenant storage limit, 10 GB OneDrive storage per user, and that Developer SKUs do not contribute additional SharePoint storage in mixed-license scenarios.  

Reference: Microsoft 365 Developer Program FAQ | Microsoft Learn 

Since you mentioned that your tenant had been operating above the 300 GB limit for an extended period and that the limit only started being enforced recently, it is difficult to determine through the community forum whether this behavior is the result of a recent entitlement enforcement, a storage policy change, or a tenant-specific issue. 

To further investigate this issue, you could consider to create ticket online or contact support by signing in to Engage Center as Developer Support is available as an optional component of Microsoft Unified Support.  

You can refer via: Open a new Support request - Microsoft Engage Center | Microsoft Learn 

Please note that this is a paid support channel and requires either an active Microsoft support plan or the purchase of a one-time support incident. This ensures that your inquiry is routed directly to the appropriate Microsoft Product Group responsible for the affected service or feature. These teams consist of the engineers, developers, and subject matter experts who design, maintain, and support the product itself. As a result, they are uniquely positioned to provide accurate, detailed, and authoritative guidance, particularly for complex, uncommon, or edge-case scenarios that may not be fully addressed through publicly available documentation, community forums, or standard support channels. 

If you receive any additional information or insights from the Developer Support team, please feel free to share them here. Your findings could help enrich the community's knowledge base and assist other users who may encounter the same issue in the future. 

I hope this helps. 

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