Ok I am still getting this error. I have uninstalled ESM and installed Adminpack2003 as well as ESM 2003 again. I made sure that the mapi32 and cdo dlls are the same. I am logged on using the Blackberry service account and when I bring up ESM it says RPC server unavailable. When I go to Blackberry Manager and try to add a user it pulls up the Global address list and when the name is selected the name disappears. Can anybody help?