Problem with Mailbox

Question

Hello,

Please i need your help on this issue.

One of my user is facing a problem with Mailbox. He cannot receiving messages because the size is sufficient. 99GB.

I need in increasing the mailbox

Answer 1

Hello, @IniobongNkanga-8038

Welcome to the Microsoft Q&A platform!

Based on your description, one of your users cannot receiving messages because the size has reached the limit. To increase the mailbox size, you can follow these steps:

1. Upgrade the Subscription License: The mailbox size is determined by the subscription license. Upgrading to a higher plan, such as Exchange Online Plan 2, can increase the mailbox size to 100GB.
2. Enable Archive Mailbox: You can enable an archive mailbox, which provides additional storage space. Users can move or copy messages between their primary mailbox and the archive mailbox.
3. Use PowerShell to Set Custom Quotas: If you need to set custom quotas, you can use PowerShell. Here’s a basic example:

Set-Mailbox -Identity "UserEmail" -ProhibitSendQuota 95GB -ProhibitSendReceiveQuota 99GB -IssueWarningQuota 90GB

(Replace "UserEmail" with the actual email address of the user.)

For more help on increasing the mailbox size, please refer to:

1.Increase or customize Exchange Online mailbox size - Exchange | Microsoft Learn

2.Enable archive mailboxes for Microsoft 365 | Microsoft Learn

Should you need more help on this, you can feel free to post back. 

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If the answer is helpful, please click on “Accept answer” as it could help other members of the Microsoft Q&A community who have similar questions and are looking for solutions.

Thank you for your support and understanding.

Best Wishes,

Alex Zhang