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Unable to mount any mailbox store in a storage group (event id 9518 + event id 454 + event id 494)

yesterday one fo our servers got hang , so we had to hard restart the server

once the server got up again we found that all mailbox stores under one storage group failed to brign online

and we found that the below 3 event log appeared in the event viewer :

Event Type: Error
Event Source: ESE
Event Category: Logging/Recovery
Event ID: 494
Date:  6/24/2012
Time:  1:46:51 AM U
ser:  N/A Computer: server1
Description: Information Store (8676) Storagegroup1: Database recovery failed with error -1216 because it encountered references to a database, ‘G:\EXCHSRVR\StorageGroup1\MAilboxstore1.edb’, which is no longer present. The database was not brought to a Clean Shutdown state before it was removed (or possibly moved or renamed). The database engine will not permit recovery to complete for this instance until the missing database is re-instated. If the database is truly no longer available and no longer required, procedures for recovering from this error are available in the Microsoft Knowledge Base or by following the “more information” link at the bottom of this message.
Event Type: Error
Event Source: ESE
Event Category: Logging/Recovery
Event ID: 454
Date:  6/24/2012 Time:  1:46:51 AM
User:  N/A
Computer: server1
Description: Information Store (8676) storagegroup1: Database recovery/restore failed with unexpected error -1216.
Event Type: Error
Event Source: MSExchangeIS
Event Category: General
Event ID: 9518
Date:  6/24/2012 Time:  1:46:51 AM
User:  N/A
Computer: server1
Description: Error 0xfffffb40 starting Storage Group /DC=com/DC=domain/CN=Configuration/CN=Services/CN=Microsoft Exchange/CN=name/CN=Administrative Groups/CN=First Administrative Group/CN=Servers/CN=server1/CN=InformationStore/CN=storagegroup1on the Microsoft Exchange Information Store. Storage Group – Initialization of Jet failed.

we have tried to do soft recovery for mailbox store mailboxstore1 by running command eseutil /r “logbase” /l “Log path” /d “Database path”

but it failed and could repair the Database softly

the problem here was because the path of the DB and the path of the Logs wasn’t the same, so we moved the DB files to the same path as the logs and try the command one more time, and it success and could mount the all mailbox stores

Publish Multiple OWA & ECP Virtual Directories on one Exchange 2010 CAS Server

Suppose you host more than one domain at your Exchange server , and each company need to have its OWA URL , below is steps how you can implement more than one OWA & ECP on one Exchange 2010 server

1- Create a new WEB SITE
– New IP
– Ports 80 / 443
– Name WebMAIL
– Default Path – C:\inetpub\wwwroot

2- Install Certificate (HTTPS) for External User

3- Copy the Folders:
C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\Owa
C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\ecp
C:\Program Files\Microsoft\Exchange Server\V14_domainname\ClientAccess\Owa
C:\Program Files\Microsoft\Exchange Server\V14_domainname\ClientAccess\ecp

4- ON IIS – ISAPI and CGI Restrictions
Give Permission ALLOW to this DLL
C:\Program Files\Microsoft\Exchange Server\V14_domainname\ClientAccess\Owa\auth\owaauth.dll

5- On Exchange Power Shell
new-owairtualDirectory -WebSiteName “WebMAIL” -Path “C:\Program Files\Microsoft\Exchange Server\V14_domainname\ClientAccess\Owa”

New-ecpVirtualDirectory -WebSiteName “WebMAIL” -Path “C:\Program Files\Microsoft\Exchange Server\V14_domainname\ClientAccess\ecp”

6- Fix Virtual Directory Path
In IIS – change – The Virtual Directory Path

7- In Exchange Console
– Server Configuration > Client Access > <server> > Outlook Web APP > owa (Mail) > Properties Authentication > Use one or more standard authentication methods > FBA

– Server Configuration > Client Access > <server> > Exchange Control Panel > ECP (Mail) > Properties Authentication > Use one or more standard authentication methods > FBA

8- Reset IIS

Now try to browse the URL of the new OWA

Check Exchange 2010 , 2010 SP1 , 2010 SP2 Queue size automatically

You can use a script check number of mails stuck at the queue and send you an alert if the number of mails exceeds 10 or whatever number you want

You can schedule this script to run every 15 min

#Script:   GetQueueMails.ps1
#Purpose:  This script collect info about the server Queue and trigeer an alert if the #               number of mail in queue exceeds 10 mails it send a full report
#about mails in queue to the address mentioned below
#Author:   John Yassa
# Email:
# Date:     June 2012
# Notes:
#            – tested with Exchange 2010 SP1 and Exchange 2010 SP2
#            – The log report output file will be created under “c:\queue.txt”

Add-PSSnapin Microsoft.Exchange.Management.PowerShell.E2010

$filename = “C:\queue.txt”



if ($server.messagecount -gt 10)


$server | Where-Object { $_.MessageCount -gt 10 } | Format-Table -Wrap -AutoSize | out-file -filepath C:\TEMP\qu.txt

Start-Sleep -s 10

$smtpServer= “IP of SMTP Server”

$msg = new-object Net.Mail.MailMessage

$att = new-object Net.Mail.Attachment($filename)

$smtp = new-object Net.Mail.SmtpClient($smtpServer)

$msg.From = “Mail From Address

$msg.To.Add(“Mail To Address“)



$msg.Body = “Kindly check attached queue log file for more information”




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