When you need to copy the addresses and phone numbers of an organization to a contact that it's linked to, you can use Bulk Edit. This will copy the information to empty address and phone number fields, so it won't overwrite existing contact information.
- Go to the Contacts tab
- Tick the checkboxes next to the contacts you'll be updating
- Click the Bulk Edit icon
- Choose Copy Phone Numbers from default linked Organization to Contactor Copy Addresses from default linked Organization to Contact
- Click Save Bulk Edits
The contacts with no addresses or phone numbers will be updated with their related organizations' information. Existing contact information will not be overwritten.