Exchange 2010 post migration distribution list permissions issue

I performed an exchange migration from a Server 2003/Exchange 2003 to Server 2008 R2/Exchange 2010 at the end of 2011, and I am realizing an issue with Distribution List permissions.

Distribution lists that existed on the 2003 server (where I could modify/add/delete) were migrated to Exchange 2010 and on Exchange 2010 I am not able to make any changes, because the account (domain administrator, account used to install and configure exchange) is not listed in the "Managed By:" group. No users are listed in these groups.

I have verified that my domain administrator account is listed as a manager/owner for all exchange groups through the Exchange Control Panel. I am able to create/modify/delete new distribution lists in Exchange 2010 without issue.

I have attempted to add another administrative account to the owners group in ECP, but it is not applied to the migrated Distribution Lists.

I have attached an image of the permissions and the error I receive when I attempt to add a user to a distro group.

This is potentially a carryover issue from a SBS 2000 -> Exchange 2003 migration that was performed before I managed this environment, as I can modify groups from Exchange 2003 that I created before the migration (the groups that I cannot manage were created before I managed the 2003 environment).

Any assistance would be appreciated.
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scisupportAuthor Commented:
Thank you, I was able to resolve the issue with your information.
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