Min password length error server 2012

I need to set up a couple of users on our domain but they need to have 6 character passwords (apparently using 7 would be just too much hassle and unfortunately due to their positions its not a battle the IT dept are going to win)

We are using server 2012 for our DC

each time I try to set a password I get the 0x800708c5 error.

I have set the password policy to have the following parameters

Enforce Password History - 3 passwords remembered Max password age - 42 days Min password age - 0 days Min password length - 6 characters password must meet complex req ... - disabled

after setting these i ran a gpupdate /force command to update

its still not letting me set a 6 character password, each time im getting the same error code.

Any ideas why this is happening?