Office 365 (Exchange Online)/Exchange Server
Full error text
Delivery has failed to these recipients or groups: firstname.lastname@example.org The recipient's mailbox is full and can't accept messages now. Please try resending your message later, or contact the recipient directly. Diagnostic information for administrators: Generating server: OFFICE365_SERVER_NAME/EXCHANGE_SERVER_NAME email@example.com Remote Server returned '554 5.2.2 mailbox full; STOREDRV.Deliver.Exception:QuotaExceededException.MapiExceptionShutoffQuotaExceeded;...
Error number (if any)
The recipient of this email has his mailbox reached the maximum quota.
How to fix?
Increase the maximum mailbox size for the affected user, or delete email messages from the mailbox of the user to free some space in it
Here is a link on how to increase the mailbox size for a user on:
Office 365: https://support.microsoft.com/en-us/help/2490230/how-to-set-exchange-online-mailbox-sizes-and-limits-in-the-office-365
Exchange Server: https://technet.microsoft.com/en-us/library/aa998353(v=exchg.160).aspx
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