My questions: 1) Is it "expected" behavior that while I can assign a group to the "ManagedBy" property of distribution list, members of that group are still unable to edit the group membership? ...or is there a fix for the behavior I'm seeing? 2) Can multiple values be assigned to the "ManagedBy" property when using Set-DistributionList - ex: Set-DistributionList DLName -ManagedBy:user1,user2 3) Any other suggestions? Thanks, -Lance 1- Yes it is expected behavior. IF you goto EMC to add a user to managed-by property of a list, then EMC will only show you mailbox users to be added to managed-by property of the list. EMC wont show you D-lists to be added to managed-by property of a D-list. I have read somewhere that this behavior is to ensure that a loop is not created, where someone mistakenly adds the DL to managed-by property of itself. 2- Yes multiple users can be added using PS command like this. Set-DistributionList DLName -ManagedBy user1@domain.com,user2@domain.com 3- My suggestion is to automate this process using Powershell scripting if you have large number of users to be added to managed-by property of DLs. You can somehow put user names in a csv file and then read that file to add them to managed-by of DL. If this is the way you want to go, then open another thread in this forum, so that more people can participate in that thread reading the Title of the thread. Regards, Laeeq Qazi|Team Lead(Exchange + Sharepoint + BES + DynamicsCRM) www.HostingController.com Marked As Answer byRichard Wang - MSFT<abbr class="affil" style="font-weight: inherit; font-style: inherit; font-family: inherit; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.5em; outline-width: 0px; outline-style: initial; outline-color: initial; display: inline-block; vertical-align: top; color: #000000; padding: 0px; border: 0px initial initial;">MSFT</abbr><abbr class="affil" style="font-weight: inherit; font-style: inherit; font-family: inherit; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.5em; outline-width: 0px; outline-style: initial; outline-color: initial; display: inline-block; vertical-align: top; color: #000000; padding: 0px; border: 0px initial initial;">, Moderator</abbr>Wednesday, June 30, 2010 9:24 AM According to above suggestion frm Laeeq Qazi I have large # of DL groups over 3000 and involves total 9000 managed-by record in csv (each admin in each row of csv) to apply. I tried apply thr csv in powershell: import-csv C:\Script\AddDistributionGroupOwnerList.csv | ForEach {Set-DistributionGroup -BypassSecurityGroupManagerCheck -Identity $_.GroupName -managedby $_.ManagedBy} However, it is overwritten existing managed-by and add last one only after applied. Such as there are 3 managed-by users: UserA, UserB and UserC in group: group1 Finally, I found there is only UserC listed as managed-by in group1. Although UserA and UserB are added, finally is removed after applied UserC. I don't really want to apply in PS command as Set-DistributionList DLName -ManagedBy user1@domain.com,user2@domain.com, ................................ It is really time consuming to organize and manually work to ready in such format Pls help. Tks a lot

Hi, Kindly let me know if I get it right: single distribution list should be managed by more then 1 user, if thats the requirement then make a security group owner of that group & all the members of security group will be the owner of that group, do let me know if I get it wrongly.Ripu Daman Mina | MCSE 2003 & MCSA Messaging

Hi Ripu, you are right. However, I don't want to keep DL group with ACL group (security group). Actually, ACL group in my environment is control the access of mailbox. And finally, I still have to apply that powershell script of those managedBy on ACL group. That script is same as applying on DL or security group. That concern is still exist.