As an Organization Sync administrator, you have a primary and a secondary Salesforce organization, each with a different administrator username and password. Before you can add data to the secondary organization, you must complete a few setup tasks and create a replication connection between the two organizations.
Because browsers cache your Salesforce credentials, it’s difficult to log in to two different Salesforce organizations in one browser. For best results, work in two browsers. Designate one browser for each organization. For example, use Google Chrome© to access the primary organization and Mozilla Firefox© to access the secondary.