Recieved 'Mailbox Full" message and upgraded to Premium 6T Box but still recieving 'Mailbox full message' and cannot send any emails

Question

Recieved 'Mailbox Full" message and upgraded to Premium 6T Box but still recieving 'Mailbox full message' and cannot send any emails

Answer 1

Hello,

Is this your personal account outlook.com?

There's no such storage plan that's premium 6TB. Could you possibly mean you purchased the Microsoft 365 Premium? If so, that plan allows you to share with another 5 users, and each user can have 1TB of OneDrive storage, that storage cannot be pooled for one user.

In addition, when you upgrade to a Microsoft 365 plan, it only increases your mailbox size to 100GB, not 1TB. The 1TB is for OneDrive. You can refer the information here: https://support.microsoft.com/en-us/office/storage-limits-in-outlook-com-7ac99134-69e5-4619-ac0b-2d313bba5e9e

It can also take 48 hours to reflect the change. So if you made the purchase during the last 48 hours, please wait.

Answer 2

If you are receiving a "Mailbox Full" message even after upgrading to a Premium 6T Box, it is possible that the issue is related to the mailbox size exceeding the quota, which can include the size of the Recoverable Items folder that is not visible to users. Here are some steps you can take to troubleshoot and resolve the issue:

1. Verify Mailbox Quotas: Check the storage quotas of your mailbox by running the following PowerShell cmdlet:

      Get-Mailbox ******@contoso.com | fl ProhibitSendReceiveQuota,RecoverableItemsQuota
   

   Also, verify the status of the mailbox quota:

      Get-MailboxStatistics ******@contoso.com | fl StorageLimitStatus,TotalItemSize,TotalDeletedItemSize
   

   If the StorageLimitStatus indicates that the quota is exceeded, you will need to take action.
2. Check Recoverable Items: If the TotalDeletedItemSize exceeds the RecoverableItemsQuota, you may need to delete items from the Recoverable Items folder. This folder can contribute significantly to the mailbox size.
3. Enable Archive: If an archive is not enabled, consider enabling it and setting up a retention or deletion policy to manage mailbox size effectively.
4. Run Mailbox Processing: If a retention policy was recently modified, run the mailbox processing manually:

      Start-ManagedFolderAssistant ******@contoso.com
   

   Wait for at least an hour and then check the mailbox again.

If these steps do not resolve the issue, you may need to contact Microsoft Support for further assistance.