Domain Username Length Limit

The sam account name attribute also known as the pre windows 2000 user logon name is limited to 256 characters in the active directory schema.

Domain username length limit. Domain username 21 characters domainnamemaxlength. This way i can store the values in a database with the correct length. Hi as marcin said usernames are simply attributes of the user s account in the active directory database. Does that include 20 characters and 3 characters.

I read that windows server is constricted to 20 characters maximum user name length. Note that the gui only lets you create 20 char names you would have to create them programatically to get past 20. However for backward compatibility the limit is 20 characters. Frankly i find such limits quite silly.

Your username must be between 3 and 20 characters. It is hard to modify the length of the user s samaccountname it is a. Usernames are supposed to be public they re not secret information in the vast majority of cases. User logon name pre 2000 samaccountname user logon name userprincipalname the samaccountname attribute can be used to log on to a windows nt 4 computer and as such that username is limited to 20 characters.

Samaccountname does not need to match upn though it typically does if you create a user with a upn and do not specify a samaccountname a random. Is there a limit to the length of a username. Users logging on to the domain from windows 2000 computers can use their windows 2000 logon name or their windows nt version 4 0 or earlier logon name regardless of the domain operations mode. Yes your username may be exactly 3 characters long or it could also be exactly 20 characters long.

Any claim that a minimum length on the username has any security merit is ridiculous. Activeroles server is using the active directory built in settings for the sam account name attribute.