I've had similar issue with both vROPs (from 7.5 to 8.0) and vRLI (from 4.8 to 8.0), although the issue occurred with upgrade via LCM 8.0
- admin login gets locked out
- root still works as well as all the users configured via IDM
- same as your situation it takes $VMWARE_PYTHON_BIN $VCOPS_BASE/../vmware-vcopssuite/utilities/sliceConfiguration/bin/vcopsSetAdminPassword.py --reset to fix the problem
Sincere regards
Chao