Use this vmcli command to view the status of guest credentials that are set for the managed datacenters.
vmcli -f get_password_info -type VMGuest
#TASK 0 get_password_info 20130129162344670
#RUN 0 20130129162344685
#LANG en_US
#PARAM BACKEND=TSM
#PARAM OPERATION_TYPE 4
#PHASE PREPARE
#PARAM BACKUP_TYPE=0
#PARAM TSM_SERVER_NAME=
#PARAM TSM_SERVER_PORT=
#PARAM TSMCLI_NODE_NAME=
#PARAM VCENTER_NODE_NAME=
#PARAM DATACENTER_NODE_NAME=
#PARAM OFFLOAD_HOST_NAME=
#PARAM PASSWORD_TYPE=VMGUEST
#PARAM TSM_OPTFILE=C:\Users\ADMINI~1\AppData\Local\Temp\2\T4V3B15.tmp
#PARAM INPUT_FILE=
#PARAM TRACEFILE=
#PARAM TRACEFLAGS=
#CHILD username:<mydomain\myuser>
#PARENT datacentername:DataCenter1
#CHILD username:<mydomain\myuser>
#PARENT datacentername:DataCenter2
#CHILD username:<mydomain\myuser>
#PARENT datacentername:DataCenter3
#PARAM STATUS=success
#END RUN 0 2013012916234513
#END TASK 0
#INFO FMM16014I The return code is 0.
#END