After you moved bunch of mailboxes between servers or databases, you may find users can’t logon to their mailboxes. You will see the Event ID 1022 logged in Application Logs.
Event Type: Error
Event Source: MSExchangeIS Mailbox Store
Event Category: Logons
Event ID: 1022
Time: 10:50:10 AM
Logon Failure on database "StorageGroupDatabase" – Windows 2000 account Domainusername; mailbox /O=orgname/OU=companyname/cn=Recipients/cn=username.
Solution: Update the Exchange “Recipient Update Service” and trigger the Active Directory replication between domain controllers and sites. OR simply wait for AD Replication and Exchange Recipient Updates to happen automatically on its course.