Newly created custom attributes in vCenter that have no value (empty) do not appear in Aria Operations.
Attributes that were previously synchronized but then cleared in vCenter remain on the VM object in Aria Operations but show as empty.
Environment
Aria Operations 8.18.x
Cause
Aria Operations requires a non-null value for the initial discovery and creation of a property key via the vCenter adapter. Once created, property keys persist for the lifecycle of the object to maintain historical integrity.
Resolution
To synchronize a new attribute, ensure it has a value in vCenter.