How sub is generated?

Hi,

I would like to know how sub are generated. I’m asking this because when i import user from ldap the sub have this format : 8ef58dcf-1a53-4e7f-a155-b0e7d2cdc892 but when i create a new user with registration form i have something like that : f:84658633-311f-48a8-9d4f-4e47e7dd2a68:testcpayet. I would like to have only one format.

Thanks,

Dan

Hi again,
Any idea guys ?

Dan