Exchange 2010 – How to check mailbox limits


Mailbox limits can be checked through cmdlet Get-MailboxStatistics

We can also calculate mailbox sizes based on a database as can be seen in article: How to Calculate Exchange 2010 Mailbox Sizes with PowerShell

  • Get-Mailbox -Database DB01 | Get-MailboxStatistics | ft displayname,totaldeleteditemsize,totalitemsize
  • Get-Mailbox -Database DB01 | Get-MailboxStatistics | %{$_.TotalItemSize.Value.ToMB()} | Measure-Object -sum -average -max -min

Quotas on mailbox/database can be checked:

  • Get-MailboxDatabase DB01 | fl *quota*
  • Get-Mailbox "TestUser" | fl *quota*

Be careful: Items in the “dumpster/recover deleted items” do not count against database limits.

Exchange Server Forums: Dumpster count towards the mailbox Quota/Size

Understanding Recoverable Items

The Recoverable Items folder contains the following subfolders:

  • Deletions – This subfolder contains all items deleted from the Deleted Items folder. (In Outlook, you can soft delete an item by pressing Shift+Delete.) This subfolder is exposed to users through the Recover Deleted Items feature in Outlook and Outlook Web App.
  • Versions – If either litigation hold or single item recovery is enabled, this subfolder contains the original and modified copies of the deleted items. This folder isn’t visible to end users.
  • Purges – If either litigation hold or single item recovery is enabled, this subfolder contains all items that are hard deleted. This folder isn’t visible to end users.
  • Audits – If mailbox audit logging is enabled for a mailbox, this subfolder contains the audit log entries.


XADM: Understanding Deleted Item Retention and Message Deletion
Process

XCLN: Understanding Deleted Item Recovery

Outlook – Tips For Cleaning Up Your Mailbox

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