When accessing an environment, both SYSTEM-DOMAIN and vsphere.local are present:
Environment
vCenter server 7.0.x
vCenter server 8.0.x
Cause
This is due to something that did not migrate correctly during the migration from 5.1 to 5.5 and above.
Resolution
Take a powered off snapshot of the vCenter appliance before performing the activity(if the vCenter server is in linked mode, take a powered off snapshot of all the linked vCenter servers).
Run the following command to remove the identity providers from VMDIR: