Cross-forest Exchange migration

Cross-forest Migration

Cross-forest migration for Exchange 2007 to Exchange 2010/2013/2016/2019

Coexistence of Exchange 2003 and 2013/2016/2019, 2007 and 2016/2019 or 2010 and 2019 is not possible. However, EdbMails Exchange migration tool simplifies the cross-forest and cross-domain mailbox migrations between on-premises Exchange environments.

Follow the below steps for Exchange cross-forest migration:

Step-1. Get ready with the target Exchange server in a new Active Directory forest
Refer the below links to configure mail flow and client access:
Exchange 2010
Exchange 2013
Exchange 2016/2019
Step-2. Prepare domain accounts on the target server
Migrate domain accounts between the Active Directory forests. You can do it automatically using Active Directory Migration Tool (ADMT) or create the accounts manually in the target forest.
During the mailboxes matching step, you can also create the mailboxes to the corresponding users automatically.
Step-3. Download and Install the EdbMails application
a. Download and install EdbMails on your computer. Download
b. Double click the EdbMails setup (EdbMailsSetup.exe) to install the application.
c. Follow the instructions that appear to complete the installation.
Step-4. 'Login' or 'Start Your Free Trial' to access the application
Click the 'Login' or 'Start Your Free Trial' button.
Step-5. Select 'Exchange Migration'
Select the option 'Exchange Migration' and click the 'Continue'.
Step-6. Connect to Source Exchange Server
Login to Source Live Exchange
Click here for the detailed steps on Exchange server login using EdbMails
On successful login, you will be displayed with the list of mailboxes.
Load Mailboxes from CSV
After successful login, if the automatic mailbox listing has failed to retrieve all the mailboxes name then you can load all the mailboxes name using .csv file. However, if the listing is successful then you can ignore this step and continue to next step.
Click here for the detailed steps on listing mailboxes using '.CSV' file
Click the 'Continue' button.
Step-7. Perform Live Exchange to Live Exchange Migration
Select the mailboxes for migration
Select the mailboxes that you wish to migrate.
Choose the migration type as 'Full migration' or 'Incremental migration'.
Click the 'Migrate to Destination Exchange [Incremental]' button to continue.
Login to Destination Live Exchange
Login to the target Exchange server. Click here for the detailed steps on Exchange server login using EdbMails
On successful login, you will be displayed with the list of mailboxes.
Load Mailboxes from CSV
After successful login, if the automatic mailbox listing has failed to retrieve all the mailboxes name then you can load all the mailboxes name using .csv file. However, if the listing is successful then you can ignore this step and continue to next step.
Click here for the detailed steps on listing mailboxes using '.CSV' file
Click the 'Continue' button.
Map Source and Target Mailboxes
Map the source mailboxes to target Exchange server mailboxes. Click here for the details.
Start the Migration Operation
Click the 'Continue' button to start the migration operation.
That's it! During migration operation, you can view the progress as shown below.

Appropriate message will be displayed on completion of the migration operation.
Click the 'View Log' button to view the migration operation log.
Login to your Exchange server to verify migrated items such as emails, calendars, contacts etc.