How to Recreate Missing Arbitration Mailboxes Exchange 2016?
The administrators of Exchange Server faces different type of issues in Exchange Server environment as part of management. For e.g. after migrating to on-premises Exchange 2013 or other editions, issue commonly recognized where Event log errors received with mention of Exchange arbitration mailboxes. In other words, it means that mailboxes are either corrupt or missing.
Exchange Arbitration Mailboxes
Arbitration mailboxes also represented as Exchange system mailboxes whose functions are similar to local system data and message workflow management.
The main five arbitration mailboxes with functionalities discussed below:
Microsoft Exchange Federation Mailbox (FederatedEmail.4c1f4d8b-8179-4148-93bf-00a95fa1e042)
Capable to store database of Exchange for federation management between Exchange organizations.
Microsoft Exchange Migration (Migration.8f3e7716-2011-43e4-96b1-aba62d229136)
For keeping data services of Exchange migration in batch migration.
Microsoft Exchange Approval Assistant (SystemMailbox{1f05a927-XXXX-XXXX-XXXX-XXXXXXXXXXXX})
Utilized in Exchange approval framework (for moderating recipient and auto group approval requests).
Microsoft Exchange (SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c})
For building Address Books offline.
Microsoft Exchange (SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9})
To locate messages identified by some matches via e-Discovery feature.
However, in order to deal with issues related to Exchange arbitration mailboxes such as corruption or missing after migrating to Exchange on-premises, we have the option to rebuild mailboxes. In the further section we will discuss precise method with pre-requirements.
Pre-requirements
Exchange user or administrator should assign Recipient Provisioning Permissions.
Membership in Enterprise Admins Security Group.
- If Exchange Arbitration mailboxes are in corrupted state, then a user need to delete all User Types from Active Directory user profiles.
Note: Execute the command: Get-Mailbox-Arbitration if arbitration mailboxes removed.
- If Exchange Arbitration mailboxes deleted or missing, run the command shown in Windows Command Prompt to again create mailboxes.
<Drive>: \Setup /preparead /lAcceptExchangeServerLicenseTerms
Enable Arbitration Mailboxes
Once arbitration mailboxes recreated, enable them by executing the following commands in EMS (Exchange Management Shell).
A user can verify successful recreation of Exchange arbitration mailboxes by executing the command given below using ADServer settings.
However, now you will get rid of Event Log errors and other issues such as missing, deletion or corruption of arbitration mailboxes when DAGs are recreated or corrupted.
Conclusion:
Exchange arbitration or system mailboxes can be corrupted or missing during the migration that cause issues such as restriction in the local movement of Exchange mailboxes. The blog has discussed manual solution to recreate Exchange arbitration mailboxes by utilizing Exchange Management Shell cmdlets.
Note: In case you are looking to repair corrupt Exchange mailboxes, then you can use EDB Repair Solution and fix all the errors precisely. Moreover, you can utilize Exchange Migration Tool to migrate Exchange emails, contacts, calendar and other database into Outlook PST, Office 365, Exchange etc.
