Hi, We are using Exchange 2007 in our organisation. We moved some of the users from one mailbox server to another mailbox server within Exchange 2007. After moving those users they are unable to modify the Distribution List in outlook while before moving them they were able to modify them without any issue. DL and their owners both exists in the same domain. They are getting the below error while trying to modify the DL------ "Changes to the Distribution List Membership Could Not Be Saved. You do not have sufficient permission to perform this operation on this object" The Scope of DL is Universal. Best Regards, Parveen Email- prvpnr@hotmail.com

Do you mean moved to 2010 ? If so, see http://www.howexchangeworks.com/2011/10/group-owners-cannot-manage-distribution.html

No, they have not been moved to 2010. They have been moved to another exchange 2007 mailbox server within the same domain.Best Regards, Parveen Email- prvpnr@hotmail.com

Hi there, You may configure Outlook to a specific GC, or upgrade to RU8. Refer to: http://support.microsoft.com/kb/2732525 Hope it is helpful.Fiona Liao TechNet Community Support