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Thing is I dont know how but there are not even any arbitration mailboxes on there.
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Thing is I dont know how but there are not even any arbitration mailboxes on there.

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Try these commands. These will list you the system mailboxes and user mailboxes. If both shows return no results you can remove the database.<br />

<pre><code id="code-20-41764942-1">Get-Mailbox -Arbitration</code></pre>
<pre><code id="code-20-41764942-2">Get-Mailbox</code></pre>
<br />
To remove mailbox database. <br />

<pre><code id="code-20-41764942-3">Remove-MailboxDatabase &quot;Mailbox Database 0716284986&quot;</code></pre>
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Note: This command will not run successfully if your mailbox database holds mailbox. It will return an error &nbsp;&quot;This mailbox database contains one or more mailboxes, mailbox plans, archive mailboxes, or arbitr....................<wbr />..........<wbr />....&quot;<br />
<br />
Thanks<br />
MAS
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Try these commands. These will list you the system mailboxes and user mailboxes. If both shows return no results you can remove the database.


Get-Mailbox -Arbitration

Get-Mailbox


To remove mailbox database.


Remove-MailboxDatabase "Mailbox Database 0716284986"


Note: This command will not run successfully if your mailbox database holds mailbox. It will return an error  "This mailbox database contains one or more mailboxes, mailbox plans, archive mailboxes, or arbitr.................................."

Thanks
MAS

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its up to you.<br />
<br />
<a href="https://blogs.technet.microsoft.com/rischwen/2012/12/17/exchange-2013-default-db/" rel="ugc">https://blogs.technet.microsoft.com/rischwen/2012/12/17/exchange-2013-default-db/</a>
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its up to you.

https://blogs.technet.microsoft.com/rischwen/2012/12/17/exchange-2013-default-db/ [https://blogs.technet.microsoft.com/rischwen/2012/12/17/exchange-2013-default-db/]

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If I add a new mailbox server to the DAG is always seems to create a default mailbox database that we don't need. Problem then is because there is only one copy it fails database redundancy and database availability checks (because there is onkly one copy).<br />
<br />
Can we delete this database at all?
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If I add a new mailbox server to the DAG is always seems to create a default mailbox database that we don't need. Problem then is because there is only one copy it fails database redundancy and database availability checks (because there is onkly one copy).

Can we delete this database at all?

Exchange 2013 - Default mailbox DB created (mailbox database 999999999) - Can it be deleted?

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.