Summary

This article provide a summary on how to  split domain of an organization into two customers/tenants.

Applies To

Scenario Overview

Existing Setup:

• Customer-A
  
  • OrgA
    
    • Domains:
      
      1. DomainA.com
      2. DomainB.com
  • Users exist in both domains

Required Target Setup

• Existing Customer (Customer-A)
  • OrgA
    • Domain: DomainA.com only
    • Mailboxes: All users should belong to DomainA.com

• New Customer (Customer-B)
  • OrgB
    • Domain: DomainB.com only
    • Mailboxes: Users migrated from OrgA (DomainB.com users)

Solution Steps

Step-1: Create New Customer 

• Create Customer-B with Organization Name as “OrgB” but with dummy domain “DomainC.com” since the panel already has domain DomainB.com.

• Assign a temporary (dummy) domain (e.g., DomainC.com)

• Reason: DomainB.com is already associated with OrgA in the panel.


Step-2: Move Users on Backend

• Move users of DomainB.com from OrgA to OrgB:
  • OrgA OU → OrgB OU 
• Ensure:
  • There should not be any permissions/settings from DomainA.com user on DomainB.com user and vice versa.

Step-3: Update Database Records

• Modify the MachPanel Database table:
• Table Name: HB_tblExchangeOrganizationDomains

​

• Required Changes:
  • Update OrganizationID for DomainB.com to associate it with OrgB i.e. 24 in given example.
  • Set IsDefaultDomain = True for DomainB.com
  • Remove the dummy domain (DomainC.com) entry

Record Before:​​

Record After:

​

Ensure database backup is taken before making changes.

Step-4: Update UPN Suffixes in Active Directory

Ensure each organization (OU) has only its valid domain:

• OrgB OU
  • UPN Suffix: DomainB.com

​​

​

• OrgA OU
  • UPN Suffix: DomainA.com

Step-5: Perform Backend Synchronization

• OrgA
  • Perform Sync from backend for OrgA, check DomainB.com users (Mailbox and AD Users) get removed form OrgA.

Result:

• OrgB 
  • Perform Sync from backend for OrgB, verify DomainB.com users are part of OrgB Exchange Security Group, AL, GAL, OAB etc.

After: