To track messages that failed because of a SizeLimit

To track messages that failed because of recipient’s MaxReceiveSize:

Get-MessageTrackingLog -EventID FAIL -ResultSize Unlimited | where {$_.RecipientStatus -like “*RecipSizeLimit*”}

To track messages that failed because of the sender’s MaxSendSize:

Get-MessageTrackingLog -EventID FAIL -ResultSize Unlimited | where {$_.RecipientStatus -like “*SendSizeLimit*”}