Mailbox fail to sync with error "Quest.MigrationManager.Exchange.Basis.LdapHelperException: Can't find object by LEDN" (4261049)

The mailbox fail to sync with the following error in the log file:

M61 Error Quest.MigrationManager.Exchange.Basis.LdapHelperException: Can't find object by LEDN - ''.

Resolution 1:

1. Browse to the Target Object. 
2. Take the value of the LegacyExchangeDN and add it to the ProxyAddresses field as an X500 address:
   • X500:/o=CORP/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=USER.NAME
3. Place the value from the MAgE.log into the LegacyExchangeDN attribute.

Resolution 2:

1. Back up the Migration Manager SQL DB.
2. Take down the LegacyExchangeDN show in the log file for the user which is not working.

3. Run the following query to see the mailbox ID and also the information from the mailbox:

   select * from MAILBOX_PROCESSING_PROPERTY

   • For example, Mailbox_ID for the above example is 61.
4. Look for the correct LegacyExchangeDN for the user in Target Active Directory.
5. Once the value is found run the following query and replace the correct LegacyExchangeDN:

update MAILBOX_PROCESSING_PROPERTY set PROP_VALUE = '

Start the agent and refresh the console. The error should go away and the mailbox should be synchronizing.