QuotaExceededException – Error: Cannot save changes made to an item to store. –> MapiExceptionShutoffQuotaExceeded: Unable to save changes.

Scenario:  When performing a New-MailboxImportRequest, you receive the following error:

QuotaExceededException

Error: Cannot save changes made to an item to store. –> MapiExceptionShutoffQuotaExceeded: Unable to save changes.

Solution:  Increase the Quotas on the mailbox. It was the Recoverable quotas that were giving me an issue.

Set-Mailbox mailbox -RecoverableItemsWarningQuota 100GB -RecoverableItemsQuota 100GB -UseDatabaseQ
uotaDefaults $false -IssueWarningQuota unlimited -ProhibitSendQuota unlimited -ProhibitSendReceiveQuota unlimited