Rasara,
I hope I understand you. You cannot set a password. SME requires the password to be 7 characters. If yes... then you an change this with passwordstrength
Be careful to use the exact capitalization.
config setprop passwordstrength Users normal
config setprop passwordstrength Ibays normal
It is also possible, but strongly discouraged, to disable password strength checking:
config setprop passwordstrength Users none
config setprop passwordstrength Ibays none
Definitions:
Strong - Must pass all default cracklib tests.
Normal - Must have at least 1 digit, 1 upper ([A-Z]), 1 lower ([a-z]), 1 special char, and be of length greater then 6.
None - no password checking