Event ID - 1022

Event Id1022
SourceMSExchangeIS Mailbox
DescriptionLogon Failure on database "[storage_group_name]\[mailbox_store_name]" - Windows NT account [domain_name]\[user_name]; mailbox /o=[organization_name]/ou=[site_name]/cn=[recipient_container_name]/cn=[user_name]. Error: -2147221231 For more information, click http://www.microsoft.com/contentredirect.asp.
Event InformationAccording to Microsoft:
Users tried to log on to their mailboxes during the move process. The users that were being moved could not log on.
By design in Exchange, users cannot log on to their mailboxes while their mailboxes are being moved.
Reference LinksMSExchangeIS Mailbox Store Event ID 1022 Fills Up Application Log

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