Some groups can use sudo on different debian.org systems to access the group's role account user or to do other stuff.
Most of these require the use of a sudo-password that is different from the standard ldap/unix password.
To set it, log into https://db.debian.org/ with your ldap credentials, set the new sudo-password (which needs to be different from the ldap password), optionally limiting it to only one host and confirm the change in signed mail to db.d.o as instructed.
New passwords are synced in the normal fashion, so expect delays of up to 30 minutes.
To find out to which, if any, commands you have access to run sudo -l.