Question:

Why is the Access tab visible for some organizations in my account but not in others?

Answer:

Access to user management, which the Access tab provides, depends on your role in a given organization. By default, user management features are only available to users with a role of "Account Administrator", however organization administrators may also be granted Access tab privileges.

To enable to Access tab for organization administrators, please view the following Knowledge Base Article 000001474 - How to Enable the Access Tab in the Manager Portal for Organization Administrators.