Error: “Security administrator cannot be added to this organization.” when trying to add administrator in the Elements portal

Issue:

Error: "Security administrator cannot be added to this organization." appears on the Management > Organization Settings > Security Administrators page when trying to add administrator in the Elements portal. 

Resolution:

This error usually means that the user already has access rights to an Elements organization. The other organization should delete the user from the organization so that you can add the user to your organization. 

This error can also appear if you try to add a user who has Partner Portal access rights to a company level Elements organization (account). A user who has Partner Portal access rights can only be added to the Solution Provider (SOP) or Service Provider (SEP) organization that has the same ID on both the Partner Portal organization and Elements organization. 

Partner users should not be added to the company level, since if customer has a Partner Managed subscription, a SOP level user can access the company using the scope-selector drop-down menu in the Elements Security Center portal.