Hello again, I accidentally Shift - Deleted your responses. Could you send them again. I apologize. Its a monday. Chris Hello all, I have an exchange 5.5 environment... I have users that are complaining that their Distribution Lists are randomly dropping users and adding them. Any idea what can cause this? Is there a way to see who last edited the DL's? I have verified the following - Each DL has one owner and they swear that they have not made any changes.... There are only a total of 2 people with permissions to make DL membership changes other than myself (exchange admin) - they too state they are not making the changes... I would like to know if there is a way to track the changes, or view who made the last edit. Thanks for any assistance. Regards, Chris