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Remove health monitor mailboxes from failed Exchange 2016 install?

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Last Modified: 2020-02-23
The previous exchange admin previously tried to install Exchange 2016 in a (2) DAG Exchange 2010 environment and caused some serious issues.  I went ahead and cleaned it up when I was tasked with the role but after decommissioning the Exchange 2016 server I am seeing a lot of health monitoring mailboxes and system mailboxes in our AD under CN=Microsoft Exchange System Objects.  

I want to know what is the best way to remove these identities to clean things up but without causing any issues?   Let me know if further detail needs to be provided.

I am trying to clean these up before I go into upgrading our Exchange environment to 2016.
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Saif ShaikhServer engineer
CERTIFIED EXPERT

Commented:

For deleting health mailbox manually go into following location and manually select all and delete.


<ADdomain>\Microsoft Exchange System Objects\Monitoring Mailboxes

Example:image


For deleting system mailbox go to ADUC and delete below ones.


DISCOVERY MAILBOX
DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852}


  ARBITRATION MAILBOXES
SystemMailbox{1f05a927-c403-4250-9f07-c5e43605c1ac}
SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}
SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9}
FederatedEmail.4c1f4d8b-8179-4148-93bf-00a95fa1e042
Migration.8f3e7716-2011-43e4-96b1-aba62d229136






Edward van BiljonMessaging and Collaboration Technical Lead (Exchange MVP & MCT)
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Distinguished Expert 2019

Commented:
Hi
does the above answer your question?