5/06/2019

Remote Server returned '550 5.2.3 RESOLVER.RST.RecipSizeLimit; message too large for this recipient'

Office 365 or Exchange online problem
Remote Server returned '550 5.2.3 RESOLVER.RST.RecipSizeLimit; message too large for this recipient'







Confirm the problem, 


 Get-Mailbox | fl mailboxplan,maxsendsize,maxreceivesize


If you have 

 Get-Mailbox user@mailbox.com | fl mailboxplan,maxsendsize,maxreceivesize


MailboxPlan    : ExchangeOnline-1ab122338-4f1a-bac1-c28ff8a1234
MaxSendSize    : 0 B (0 bytes)
MaxReceiveSize : 0 B (0 bytes)

Execute the command
 Set-Mailbox user@mailbox.com -MaxReceiveSize 55MB -MaxSendSize 55MB 
or 
 Set-Mailbox user@mailbox.com -MaxReceiveSize 150MB -MaxSendSize 150MB

To apply for all users run this. 
Get-Mailbox | Set-Mailbox -MaxReceiveSize 55MB -MaxSendSize 55MB
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