Uninstall password for clients

hi,

im using SEPM 12.1 RU3 and i have some 80 to 90 client group (folders) in it and all are not inheariting their policyes; i have set uninstall password for all groups(folders) and now i want to change in each group. my querry is, i have 18 indipendent SEPM and all servers has 80 to 90 group. insted of going to each group and chnge password,  is there any other way to change uninstall password in one shot;  or where this uninstallation password will be stored in SEPM?

thanks