You must pair the protected and recovery sites before you can use Site Recovery Manager.

Site Recovery Manager includes a wizard that guides you through the site-pairing process. You must establish a connection between the sites and you must provide authentication information for the two sites so that they can exchange information. Site pairing requires vSphere administrative privileges at both sites. To begin the site-pairing process, you must know the user name and password of a vSphere administrator at each site. If you are using vSphere Replication, you must pair the vSphere Replication appliances.

Site Recovery Manager Site Pairing and Recovery Process
SRM site pairing and recovery process