Hi Guys , When i create a new group in sharepoint it gives me the this error The user does not exist or is not unique I also cannot add add users. I can create groups using stsadm -o creategroup . Please help

Just quick check, you getting this error after any restore or Sharepoint move or any other operation, or is this just simply occured? read these articles, http://social.technet.microsoft.com/Forums/en-US/sharepointadmin/thread/c0930111-c056-4b89-8227-d6d57955336f thanks -wsSharePoint administrator, MCTS,MCITP