Exchange 2013: Load balancing failed to find a valid mailbox database

When you create a new Mailbox, you may get the following error:

Error: Load Balancing failed to find a valid Mailbox Database

as shown below:



When you create a new mailbox, you must select the database.


To fix this, run the following:

The IsExcludedFromProvisioning parameter has have two valid values, $True and $False. When you set this property to $True, the mailbox database is excluded from the automatic distribution process. When you set it to $False, the mailbox database is included in the automatic distribution process. The default value is $False.


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About Nicolas 255 Articles
I work as a System Engineer, based in Switzerland with a primary focus on Microsoft technologies. I have 8 years experience in administering Windows Servers. . I am a Microsoft MVP for Cloud & Datacenter Management. I also received the PowerShell Hero 2016 award by PowerShell.0rg. And finally, I am "MCSE: Cloud Platform and Infrastructure", "MCSA: Windows Servers", "Administering & Deploying SCCM", and CheckPoint CCSA certified.