Additional addresses listed on the Addresses tab are specific to that contact only. You are advised to consider whether or not you should be entering the address as an additional address or creating a new contact record.
For example, a contact in the system has their home address recorded as the main address. However, you would like to record their business address as well.
Before adding the business address as an additional address you must check to see if you need to associate the same business address to several other contacts in the system.
If the contact is the only person to use the business address then an additional address can be safely added.
However, if the business address will be associated with several contacts, and you add it as an additional address, you will then have to input this address for each of the contacts in the system.
You will have the same address in several places to maintain. In this case it would be best to create a new contact record that represents the business address and relate this contact record to all of the employee records.