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