Exchange 2013 mailbox is being excluded from provisioning

Question

I have a Exchange 2013 CU4 server on Windows 2012.  I have 2 mailbox databases setup.  One is for journaling and the other is for regular mailboxes.  I set the IsSuspendedFromProvisioning switch to true on the journal DB about 8 months ago. 
Recently, when I go to make a mailbox it says "Load balancing failed to find a valid mailbox database."  Upon Investigating, I discovered that the regular mail DB had its
IsExcludedFromProvisioning switch set to true.  I changed it to false and the mailbox was created fine.  A couple days later, I went to add another mailbox and the same thing happened.  I monitored the mailbox status and determined that
within 30 mins of setting the IsExcludedFromProvisioning switch to true that it switches back to false.  I am unsure of how to correct this.  Any thoughts?

Answer 1

Here is the output from the requested cmdlet.
[PS] C:\Windows\system32>Get-MailboxDatabase MDB01 | Select name,*provision*
Name : MDB01
IsExcludedFromProvisioning : True
IsExcludedFromInitialProvisioning : False
IsSuspendedFromProvisioning : False
IsExcludedFromProvisioningBySpaceMonitoring : True
MailboxProvisioningAttributes :
Recently the only changes made to the Exchange organization has been moving the journal db to a new HDD.  I didn't have any issues or errors.
I notice that the IsExcludedFromProvisioningBySpaceMonitoring  is set to false.  Is this determining how much room is left on the drive.  I looked at the drive and see that there is still 10.7 GB left of the available 149 GB.  I know
that Exchange tends to work on percentages now so is this below the needed available diskspace to provision to automatically?
Thank you for the input.