He abierto una incidencia con VMware y me han contestado lo siguiente:
"As per your email, I understand that the assigned licenses in vCenter Server for SRM 4.0 shows as 0. You have ESX hosts running in vCenter Server on disaster site as well as on production. You have applied licenses for SRM but it still shows the count in assigned columned as 0.
The issue related to the query is known and we are working on this issue. Though the assigned licenses shows as 0 but ESX hosts will get licensed for SRM. You can check fail over test to know whether SRM is working.
If there is any issue in fail over test, please let us know to check the cause of the issue.
As for as assigned licenses is concerned, we will release the patch to fix the issue. You will be informed about the new patches accordingly."
Por lo que se ve es un problema y están realizando un parche para corregirlo. El test me ha funcionado correctamente.
Saludos.