Storage issue even after I purchased additional storage

Hi, I'm John! I will help you with this.

Microsoft Q&A is public, and we can only provide information.

After purchasing additional storage (or freeing space), it can take up to 24 to 48 hours for everything to fully update across your account. I’d recommend waiting that time and then trying again to send your emails.

I really hope this information is helpful! Let me know if you have any further questions or concerns.

Regards,

John J.D.

It sounds like you are experiencing a common issue where the storage quota is not reflecting the additional storage you purchased. Here are some steps you can take to troubleshoot this problem:

1. Verify Storage Quota: Check the actual storage quota and usage by running the following PowerShell command:

      Get-MailboxStatistics -Identity <YourEmail>@domain.com | FL displayname,totalitemsize
   

   This will help confirm the storage size and whether it aligns with what you expect.
2. Check for Retention Policies: Sometimes, retention policies can affect how storage is calculated. You can check which retention policy is applied to your mailbox using:

      Get-Mailbox <YourEmail>@domain.com | fl RetentionPolicy
   

3. Mailbox Processing: If a retention policy was recently modified or applied, you might need to manually trigger mailbox processing:

      Start-ManagedFolderAssistant <YourEmail>@domain.com
   

   After running this command, wait for about an hour and check your mailbox again.
4. Contact Support: If the issue persists after trying these steps, it may be beneficial to contact Microsoft Support for further assistance. They can help identify if there are any underlying issues with your account or storage settings.

These steps should help you resolve the storage issue you're facing.

References:

• You've exceeded the storage limit for your mailbox error when signing in to Outlook on the Web
• SharePoint Online out of storage space