Scenario: A Citrix Administrator downloaded and deployed Citrix Application Delivery Management (ADM) in an environment consisting of six Citrix ADCs and
100 virtual servers. When viewing the Citrix ADM console, the administrator sees only 30 virtual servers.
Why is the administrator unable to see all 100 virtual servers?
Citrix ADM using a free license limits the number of manageable objects to 30. This explains why the administrator can only see 30 virtual servers out of the 100. The free license provides limited capabilities and is intended for small-scale environments or evaluations.
B. Trial license only allows for 30 services
Free License limits is 30
https://support.citrix.com/article/CTX285311/unable-to-see-the-data-on-adm
Answer is B - Free (default) License limits the number of managable objects. I think it's being replaced by 'Express Licenseé in the latest version, which limits even more.