I have a site where the use of the allusers@ e-mail alias is causing problems. So I have restricted names to all but a single, senior member of staff (not an administrator). I believe it is a reserved e-mail address and can't be null, is that correct?
Now that I have done that will the changes take immediate effect or do I have to go around all workstations and delete the entry from the local cache. This will be tedious as there are 40+ PCs. If not is there a quicker way.
Many thanks EH