Exchange Online Error – MapiExceptionShutoffQuotaExceeded

Error platform

Office 365 (Exchange Online)/Exchange Server

Full error text

Error number (if any)

554 5.2.2


The cause

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:

Exchange Server:

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