As Admin you can delete specific wrongly send emails from your users mailbox : Open Exchange Powershell , To delete from user@example.com email with the subject “Mail delivery failed: returning

Open exchange Powershell Set-MailboxDatabaseCopy -identity {Database_Name\New_Server_Name} -ActivationPreference 1 Confirm: Get-MailboxDatabase 'Database_Name'|fl server, databaseCopies, activationPreference

If you need to delete exchange log file in case of space problem or some other reason, Best do it safely -> open Powershell as Administrator and run : forfiles

Open Exchange Powershell to get all the bad index: To get all the bad index: Get-MailboxDatabaseCopyStatus * | where {$_.ContentIndexState -eq "Failed"} Get bad copy status : Get-MailboxDatabaseCopyStatus * |

To get exchange health status first open exchange Powershell , run the command : Get-MailboxDatabaseCopyStatus * | sort name | Select name,status,contentindexstate   If all the databases are mounted and

Some time offline address book doesn’t show recent changes we made to the exchange server. To update exchange offline: Syntax : Update-OfflineAddressBook -Identity <OfflineAddressBookIdParameter> [-Confirm [<SwitchParameter>]] [-DomainController <Fqdn>] [-Force <SwitchParameter>]