I need to view mailbox size quotes and add warnings.

Question

Is there no way to do this via the O365 Admin Portal > Exchange Admin Portal at all?

I would like to find out what the default quotas are and if I can edit them for specific mailboxes.

Answer 1

The mailbox type and the user's subscription license determine the amount of mailbox storage available. Administrators can reduce maximum mailbox sizes per user or globally.

https://learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits#mailbox-storage-limits

To view Quota of mailbox, you can connect to Exchange Online PowerShell and run the below cmdlet

Get-Mailbox JDoe@contoso.com | Select *quota*

To Set Quota of mailbox, you can connect to Exchange Online PowerShell and run the below cmdlet

Set-Mailbox JDoe@contoso.com -ProhibitSendQuota 19GB -ProhibitSendReceiveQuota 20GB -IssueWarningQuota 18GB

https://learn.microsoft.com/en-us/exchange/troubleshoot/user-and-shared-mailboxes/increase-or-customize-mailbox-size

Thanks

Ajinkya Ghare

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