When importing Aria Automation 8.x environment to prep for in place upgrade, you can authenticate to Aria Automation And to LCM, and the initial validations happen but when selecting folder, resources and network selections the options are greyed out. You also have more then one vCenter server set.
VCF 9.x Fleet Manager.
Aria Automation 9.X
More then one vCenter appliance. 8 or 9.
Deployments for Aria suite is not on primary VCF Management workload domain.
Have yet to complete Workload Domain WLD vCenters that contain Aria Suite products.
The Fleet manager import process, following Upgrade VMware Aria Automation to VCF Automation 9.0 relies directly on the MGMT or WLD DB records of the vcenter housing Aria suite.
You will need to relocate to the Management domain already included, or complete the import of the Workload domain vcenter housing The importing Aria product to pull network resources and policies to continue import.
Import the Workload vcenter endpoint before continuing with import process.