error not display database on ecp exchange 2016

Question

Our system has 2 faulty Exchange servers. I have removed these 2 servers from AD and reinstalled Exchange 2016 on 2 other servers. After installation is complete, we proceed to create a DB for the system. When creating, there is an error message Multiple databases match "MBDB02". Specify a unique value. When I checked, the database was not displayed on ECP. We used Exchange Management Shell (EMS) and the results were as shown. Can anyone help me regarding this case?

Answer 1

Hi @Pham Tien Dung,

Welcome to the Microsoft Q&A platform!

According to your description, the error message you encountered in the screenshot indicates that a database object in the Active Directory may be damaged or does not match the current Exchange server. You can try the following steps to solve this problem:

1.You need to find and remove the damaged or orphaned database objects in Active Directory. First, you can use the following command to list all database objects, including those that may be damaged:

Get-MailboxDatabase -IncludePreExchange2013 | Format-List Name,Guid,Server

Identify the database objects that may be damaged.

2. If you confirm that a database object is orphaned or damaged, you can use the following command to remove it from Active Directory:

Remove-MailboxDatabase -Identity "Mailbox Database 0616638881"

Please double-check the name of the database object you want to remove to ensure that it is accurate.

3. Make sure the replication status of Active Directory is normal. Use the following command to check the AD replication status:

repadmin /replsummary

Make sure there are no replication errors.

4. Make sure the records in DNS have been cleaned up and do not point to the old Exchange server that has been removed.
5. Force update the Active Directory schema to ensure that the newly installed Exchange server is correctly registered:

Setup.exe /IAcceptExchangeServerLicenseTerms /PrepareAD

6. After completing the above operations, restart all related Exchange services or the entire server to ensure that all changes take effect.

Please feel free to contact me if you have any queries.

Best,

Jake Zhang

Answer 2

When you’re creating database with the name “MBDB02” its showing an error – multiple databases with similar name.

To resolve this, you can do it with the help of EMS.

1.       Check all the existing databases by running the command. Also verify there are no hidden and disconnected databases.

2.       If you find any database named “MBDB02” remove it.

3.       After that create the database “MBDB02” through EMS.

Refer this link for the same.

Please Note: Since the web sites are not hosted by Microsoft, the links may change without notice. Microsoft does not guarantee the accuracy of this information.

Answer 3

Hi @Jake Zhang-MSFT

I discovered some more of these files, please help me see what they are? Is it dangerous?

C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\ecp\auth\getidtoken.aspx

 

C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\ecp\auth\logon.aspx

 

C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\owa\auth\Current\themes\resources\owafont.aspx

 

C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\ecp\auth\Logout.aspx

 

C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\owa\auth\15.1.2242\themes\resources\aria-down.css.aspx

 

C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\owa\auth\15.1.2242\themes\resources\owafont_es.aspx

 

/aspnet_client/system_web.aspx