Export Mailbox Size Quota in Exchange (2024)

• Bounced emails Incoming emails bounce back to the sender, indicating that 'Delivery has failed to these recipients or groups'.
• Email inconsistencies across devices If your mailbox is full, it can result in synchronization problems between multiple devices. This can cause inconsistencies in email status and prevent changes from being reflected across all devices.
• Email loss Emails may be rejected if your account's storage limit is reached, requiring senders to resend them when space becomes available.

The Exchange admin center (EAC) cannot configure storage quotas, even though it is mentioned in Microsoft's support documentation that the EAC can be used to do the operation

• Connect to your Exchange Online module using the required cmdlets.
• How to set the issue warning quota for a mailbox?

  To set the Issue warning quota, use the below cmdlet
  Set-Mailbox -Identity <identity> -IssueWarningQuota <value>

• How to set the ProhibitSendQuota for a mailbox?

  To set the prohibit send quota, use the below cmdlet 
  Set-Mailbox -Identity <identity> -ProhibitSendQuota <value>

• How to set the ProhibitSendReceiveQuota for a mailbox?

  To set the prohibit send receive quota, use the below cmdlet
  Set-Mailbox -Identity <identity> -ProhibitSendReceiveQuota <value>

• How to check the Office 365 mailbox size limit in PowerShell?

  To get the mailbox size and quota using PowerShell
  Get-Mailbox <Identity> | Format-List IssueWarningQuota, ProhibitSendQuota, ProhibitSendReceiveQuota

• If the StorageLimitStatus value is not empty, it indicates that the mailbox has exceeded its quota.
• The TotalItemSize value represents the mailbox size visible to the user.
• The TotalDeletedItemSize value represents the size of the Recoverable Items folder, which remains hidden from the user's view.

• AdminDroid can assist you in monitoring your users' mailbox quotas daily. It proves to be a valuable tool in managing and tracking mailbox storage effectively.

Recoverable Items Managed Right: Keeping Your Office 365 Mailbox Size Tight!

AdminDroid also offers the ability to track the recoverable storage quota, including the recoverable items quota and recoverable items warning quota.

• Archive Mailbox You can archive user mailboxes to preserve older emails and to have extra storage space for archiving older emails, keeping their primary mailbox clutter-free. By utilizing the archive mailbox, users can manage the size of their primary mailbox by transferring less frequently accessed older emails, reducing storage consumption.
• Online Archive Mailbox It is primarily designed for organizations that need to retain large amounts of data for a longer period, such as for compliance or legal requirements. Moving large amounts of data to the Online Archive mailbox helps reduce the size and performance impact on the primary mailbox.

AdminDroid: Streamlining In-Place Archive Mailbox Management with Comprehensive Reporting

AdminDroid can generate detailed reports on In-place archive mailboxes, displaying key information including archive mailbox size, archive quota, archive warning quota, etc. It provides an efficient solution for managing archive mailboxes effectively.

• Microsoft 365 Admin Center Navigate to Mailbox usage resided under Reports»Exchange. By using the storage used column, you can check users’ mailboxes individually from the list.
• Exchange Admin Center To check mailbox size in the Exchange admin center, navigate to the Recipients»Mailboxes section. You can individually select the users and check the Mailbox Usage section, which provides information about their mailbox storage used.
• Microsoft PowerShell Run the PowerShell script provided and get the detailed list of mailboxes with their storage quota details.

AdminDroid: Streamlining mailbox monitoring over warning quota, simplifying the search.

Use the dedicated Mailbox Over Warning Quota resided under Reports»Exchange»Mailbox Usage to list the mailboxes which are over the warning quota.

• You can also see the overview of created schedulers by navigating to the Schedule Reports page in your AdminDroid portal.

• To increase the storage space of user mailboxes, the simplest method is to upgrade from a Business subscription plan to an Enterprise plan.

• Or enable Exchange Online Archiving, which can provide additional storage space of either 50 GB or nearly unlimited space. With the 'Auto-expanding archive' feature in Microsoft 365, automate the process of moving older items to the archive.

AdminDroid: Simplifying Mailbox Archive Settings with Detailed Reporting

With AdminDroid, it's effortless to identify users with auto-expanding archive mailboxes. The user-friendly interface and pre-configured reports make it simple to identify the archive status of mailboxes, streamlining your mailbox management tasks.

• Archive older items Move old items to a separate Outlook Data File for storage or use automatic/manual archiving to manage items effectively.
• Empty the deleted items folder Regularly clear out the Deleted Items folder to free up space and remove unnecessary messages.
• Empty the junk email folder Periodically clean out the Junk Email folder to optimize your inbox space for important messages.
• Store attachments externally Save attachments outside your mailbox by utilizing team sites, OneDrive, or local folders on your computer. This helps prevent excessive space usage within your mailbox.