Integrate the NSX Manager with vCenter Server
Once the NSX manager appliance is deployed, you will need to log into it by going to https://FQDN_orIP to login.
You may get a warning message similar to the picture below.
Step 1. Login to NSX Manager with your credentials you specified during the OVA deployment. The default user name is admin
Step 2. Select Manage vCenter Registration
Step 3. Select Edit for the Lookup Service
Step 4. Enter your Lookup Service IP or FQDN, The lookup service port (Default is 7444 in vSphere 5.5), and credentials then Accept the certificate and click OK
Note: If you get an error message similar to below, you may need to change the port from 7444 to 443 as the lookup service port has changed in vCenter Server / vSphere 6.0.
NSX Management Service operation failed. Initialization of Admin Registration Service Provider failed. Root Cause: Error occurred while connecting to lookup service. Initialization of STS Clients failed. Root Cause: The SSL certificate of STS service cannot be verified error.
Step 5. Select Edit under the vCenter Server section.
Step 5. Enter your vCenter Server FQDN or IP and Credentials and select Yes to accept the certificate.
After that is complete, you should see a green status next to both of the services as show below.