Invite Your Owner or Tenant
To start you need to first invite your owners and tenants to their portal account. Go to My Account > Portal Accounts. All your owners and tenants will be listed there.
Fill in their email address (if you haven't already) and click Send Invite.
The owner/tenant will receive an email with a link to register for their portal account.
Owner/Tenant Registration
When the owner/tenant clicks the link the invitation they will be prompted to select a password. In the future they can simply login at rentables.com using their email address and the password they entered.
See Troubleshoot Portal Registration if your owner/tenant doesn't receive the invitation.