Size limitation for all attributes in user objects in Active Directory????

Question

hi geeks , i wanna know maximum size limit of an user objects attribute in   active directory ... like max amount of character first name attribute can hold ... Thank in advance..

Answer 1

You can use ADSI Edit to view the properties of the attributes in the Schema container of your AD. In the Schema container you can select an attribute, like Company, right click, select properties, and find the rangeUpper property of the attribute. This
is the maximum length in characters (or bytes). You can also use dsquery to retrieve rangeUpper for an attribute. For example:
dsquery * "cn=Schema,cn=Configuration,dc=MyDomain,dc=com" -filter "(LDAPDisplayName=streetAddress)" -attr rangeUpper
where your domain is MyDomain.com. This finds the maximum length for the "street address" attribute. A few values in my test domain (the values can be modified, so these are the defaults):
company                      64
streetAddress              1024
physicalDeliveryOfficeName  128
initials                      6
st                          128
postOfficeBox                40
name                        255
cn                           64
You can use the first two spreadsheets on this page to help identify attributes in AD (with no Exchange):
http://www.rlmueller.net/UserAttributes.htm
The first spreadsheet documents the attributes corresponding to the fields on most of the tabs of ADUC. For example, "st" is the attribute for state, "physicalDeliveryOfficeName" for the field labeled "office". You need the
LDAPDisplayName's of the attributes, like I used in the dsquery command above. The second spreadsheet documents all attributes in AD with more information, like the syntax and which class each applies to.
Richard Mueller - MVP Directory Services