Working with Send/Receive Limits in Exchange Online

This article includes commands to get or change the default send/receive limits in Exchange Online

Prerequisites

These scripts require the ExchangeOnlineManagement module.

Commands

Get the Current Limits

Get-MailboxPlan | fl name,maxsendsize,maxreceivesize,isdefault

Change the default limits

From the above command, find the one set as default, and copy the name into the below command:

Set-MailboxPlan <Plan Name> -MaxSendSize 150MB -MaxReceiveSize 150MB

Note: 150MB is the current limit

Change the Limit for all Plans

(Get-MailboxPlan).name  | forEach{Set-MailboxPlan $_ -MaxSendSize 150MB -MaxReceiveSize 150MB}

Get the limit for a specific mailbox

Get-Mailbox "[email protected]" | fl mailboxplan,maxsendsize,maxreceivesize

Change the limit for a specific mailbox

Set-Mailbox "[email protected]" -MaxReceiveSize 150MB -MaxSendSize 150MB

Change the limit for all mailboxes

Get-Mailbox -Resultsize Unlimited | Set-Mailbox -MaxReceiveSize 150MB -MaxSendSize 150MB

Get send/receive limits and current mailbox size for all users

$AllUsers = Get-Mailbox -ResultSize unlimited
$UserDetails = @()
$Counter = 0
 
$UserDetails = ForEach($user in $allusers) {
    $Counter++
    Write-Progress -Activity 'Processing details' -CurrentOperation $user -PercentComplete (($counter / $allusers.count) * 100)
    $UPN = $User.UserPrincipalName
    $Properties = [ordered]@{
        Name = $User.Name
        UserPrincipalName = $User.UserPrincipalName
        IssueWarningQuota = $User.IssueWarningQuota
        ProhibitSendQuota = $User.ProhibitSendQuota
        ProhibitSendReceiveQuota = $User.ProhibitSendReceiveQuota
        ArchiveWarningQuota = $User.ArchiveWarningQuota
        ArchiveQuota = $User.ArchiveQuota
        TotalItemSize = Get-MailboxStatistics -Identity "$UPN" | Select TotalItemSize
    }
    New-Object -TypeName PSObject -Property $Properties
}
 
$UserDetails | Export-CSV "Client.csv"

More Information

Configuring Max Email Message Size Limits for Office 365