A mailbox receives "The recipient's mailbox is full and can't accept messages now" or "The message store has reached its maximum size."
The recipient's mailbox is full and can't accept messages now. Please try resending this message later, or contact the recipient directly.#554-5.2.2 mailbox full 554 5.2.2
STOREDRV.Deliver.Exception:QuotaExceededException.MapiExceptionShutoffQuotaExceeded; Failed to process message due to a permanent exception with message Move/Copy messages failed. 16.55847:4000000
The sender may also receive the following error message in Outlook:
The message store has reached its maximum size. To reduce the amount of data in this message store, select some items that you no longer need, permanently (Shift + Del) delete them.
The sender may also receive the following error message in Outlook Web App:
The action couldn't be completed. An error occurred on the server.
Cause: This occurs if the items in the Recoverable Items folder of the recipient have exceeded the default quota of 30 gigabytes (GB).
Resolution: Administrator needs to increase recoverable items quota for the recipients by using this one liner: set-mailbox -recoverableitemsquota 50GB -UseDatabaseQuotaDefaults $false