mailbox quota

Question

Hi All
i am using exchange 2016 hybrid environment. we create users in onprem and migrate to online. One of my users mailbox has exceeded its quota. The user has deleted the emails but still he is unable to send or receive emails. i believe emails are in deleted items or recoverable items folder. Litigation hold is disabled on users mailbox.

Get-Mailbox -identity "user1@Company portal .com" | FL LitigationHoldEnabled,InPlaceHolds
LitigationHoldEnabled : False
InPlaceHolds : {}

Get-Mailbox -identity user1@Company portal .com | FL SingleItemRecoveryEnabled,RetainDeletedItemsFor
SingleItemRecoveryEnabled : True
RetainDeletedItemsFor : 14.00:00:00

I will execute the below syntax, will these delete the items in deleted items and recoverable items folder.
Set-Mailbox "user1@Company portal .com" -UseDatabaseRetentionDefaults $false -SingleItemRecoveryEnabled $false -RetainDeletedItemsFor 0

If i need to revert back is the below settings correct
Set-Mailbox "user1@Company portal .com" -UseDatabaseRetentionDefaults $false -SingleItemRecoveryEnabled $true -RetainDeletedItemsFor 14

Answer 1

@Glenn Maxwell

Yes. You could use above command to remove those items.

Before that, you could use command below to check the original value:

Get-Mailbox "user1@contoso.com" | select UseDatabaseRetentionDefaults,SingleItemRecoveryEnabled,RetainDeletedItemsFor  

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Answer 2

Hi @Glenn Maxwell
Since you said you “believe “ I would first suggest you to confirm the current size of the user mailbox before and after deletions, because sometimes users are deleting items with less impact on mailbox size.

Secondly it would be good if you could confirm with the NDR that it is a quota related issue.