This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(35.2, 47%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ECJ%3C/text%3E%3C/svg%3E)
Good day,
I would like to know what MBX means on this report and why it is on 0 different from the others on the same environment.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(246.4, 22%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKY%3C/text%3E%3C/svg%3E)
Hi, @Chakil Jaifar
I tested the script in my lab.
If currently no database is mounted or no database copy is active on the dag member server, the report will show mailbox count as 0.
It seems to be the normal behavior.
Does EXDAG-01 only host passive database copies on it?
If so, you don't need to worry about that.
There are DBs mounted always because the 4 servers are in DAG so I would like to know why is this happening since it must balance all the work between all of them.
A database is always active on a specific member service of DAG and other servers will only host the passive copy of the database ( and the copy would not be mounted unless a switchover is performed or a failover occurs)
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.
Thank you for the answer. This was exactly what I wanted to know.
Hi @Chakil Jaifar ,
MBX in this report means the number of mailboxes (958+1668+0+700 = 3326) which is mentioned in the top left.
0 means that server doesn't host any mailboxes or it could be possible that it has only replicas or it has a different server role. To provide more details, please share the script and the exchange server details by covering your personal information.
If the above suggestion helps, please click on "Accept Answer" and upvote it.
Hi @Ashok M ,
Please find as attached the script. Not that all servers are in DAG and it supposed that one gets the charge of the other and vice-versa. On a previous report, all of them had a number of mailboxes and last month was other server that was with 0
Exchange environment report provides the complete details about the server, databases and mailboxes. So, as per my understanding on this script, if the databases are not mounted on a particular server, then it will show the mailbox count as 0 for that server. Check if there are any active (mounted) databases on that server which reports 0.
https://www.allabout365.com/2011/06/exchange-environment-report/
Hi,
There are DBs mounted always because the 4 servers are in DAG so I would like to know why is this happening since it must balance all the work between all of them.
Again, when you run the script and at that time if there are no mounted databases on a server then that would report as 0 in the mailbox column for that server.
And there is no way to make that not happen?
Mount some of the databases on that server and run the Exchange environment report script.
To automatically re-balance the databases in a DAG, run the below script,
RedistributeActiveDatabases.ps1
https://learn.microsoft.com/en-us/exchange/high-availability/manage-ha/manage-database-copies?view=exchserver-2019
https://practical365.com/exchange-server/how-to-rebalance-mailbox-databases-in-exchange-server-dag/
If the above suggestion helps, please click on "Accept Answer" and upvote it.