How to Fix the access control defines the ObjectType {xxx-xxxx-xxx-xxxx} that can’t be resolved tab mailbox delegation at Exchange 2016 issues. 1 min read EXCHANGE Full Blogs How to Fix the access control defines the ObjectType {xxx-xxxx-xxx-xxxx} that can’t be resolved tab mailbox delegation at Exchange 2016 issues. Cary Sun December 20, 2021 If you are trying to change mailbox delegation settings via Exchange Admin center and...Read More