AD - Unable to update Schema attribute

Question

Hi, I need to update maximum value of an attribute Physical-Delivery-Office-Name in Schema. Current value is 128, new value I want to update is 512. First question is this possible?

Logged into Schema master DC
Using Schema admin role account
Updated the registry - HKLM\SYSTEM\CurrentControlSet\Services\NTDS\Parameters - REG_DWORD - Schema Update Allowed set to 1

I did all those but when I tried to update the value using MMC snap-in, I couldnt update the maximum value for Physical-Delivery-Office-Name.
I tried for few other attributes as well which I know we can edit the maximum value but none of them I could edit.

Am I missing something? Can someone help me how I can update the maximum value of this attribute?

Thanks, Arun

Answer 1

Hi @Arun Velusamy

The simplest method is to use LDIFDE to update the value, here is a sample LDF file to change the rangeupper value:

dn: CN=Physical-Delivery-Office-Name,CN=Schema,CN=Configuration,DC=<your domain>  
changetype: modify  
replace: RangeUpper  
RangeUpper: 255  
-  
  
dn:  
changetype: modify  
add: schemaUpdateNow  
schemaUpdateNow: 1  
-  

Update your domain name and save this as a text file

Then use this command to update the schema:

ldifde -i -f <filename>  

Gary.