I am Dale Hayter, a Microsoft and VMware certified Technical Consultant.

My blog has been built up over the years from my experience of working on an IT helpdesk and also from being out on-site.

Can’t modify message delivery restrictions properties on Exchange 2010 EMC

Error I was getting was :

Set-DistributionGroup Failed: Error: Couldn't find object "domain/ who is no longer in company."

Run adsiedit.msc and remove the offending user from the authOrig field on the distribution group

Source : Here