With fastpass some commands work, some don't

I'm using vMA 5.1 with Active Directory fastpass enabled.

This command works, without asking any password (fastpass is ok):

vma:~[testvcenter1.mydomain.local]> esxcli -h esxi-e1b1.mydomain.local storage nmp satp rule list

but this doesn't work:

vma:~[testvcenter1.mydomain.local]> esxcli -h esxi-e1b1.mydomain.local  storage nmp satp rule add -s "VMW_SATP_ALUA" -P "VMW_PSP_RR" -O iops=100 -c "tpgs_on" -V "TEST_VE" -M "VV" -e "TEST rule description"

It fails with the error "Must specify a server name". The same command works if I use "-s" instead of "-h", *but* it requires user credentials.

What's the reason?