Procedure

1. Go to the directory where the Directory Synchronization Tool is installed.
2. Open the clientconf.xml configuration file.
3. Set the <enableSetPrimaryEmail> tag to true to enable the primary email alias setting.
4. Edit the value of <primaryEmailAttr> in the <emailAliases> tag.
   By default, the <primaryEmailAttr> tag is set to mail for each source type, which means the mail attribute will be retrieved from the directory server and used as the primary email alias. You can change the attribute if necessary.
5. Save the changes and exit.