What are the Arbitration mailboxes and used for?

By default, first mailbox server in the environment will take 

precedence to hold arbitration mailboxes. These mailboxes more important to function some of the activities in the environments.

Still, some of the exchange administrators not fully understand the use of arbitration mailboxes, this arbitration mailbox concept was introduced from Exchange 2010 onwards.

Arbitration Mailboxes: -

• SystemMailbox{1f05a927-756e-4288-822c-7de8d00f47b5}
• SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9}
• FederatedEmail.4c1f4d8b-8179-4148-93bf-00a95fa1e042

SystemMailbox{1f05a927-756e-4288-822c-7de8d00f47b5} : -

This arbitration mailbox used for message moderation e.g it is used for message approval workflow. If user mailbox configured for message moderation, any email sent by the user it will be sent to his/her manager for approval, those approval process will be handled by this arbitration mailbox.

The display name of this account “Microsoft Exchange Approval Assistant”.

SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9}: -

This arbitration mailbox used for storing the admin audit logs in mailbox metadata for e-discovery.

The display name of this account “Microsoft Exchange” and it’s available from exchange 2010 onwards.

FederatedEmail.4c1f4d8b-8179-4148-93bf-00a95fa1e042 : -

This arbitration mailbox used for federation between two different organizations for sharing calendar free/busy and contact sharing process.

The display name of this account “Microsoft Exchange Federation mailbox” and it’s available from Exchange 2010 onwards.

Thanks for Visiting. Keep watch for the further updates!