When running Add-ADPermission "Group Name" -ExtendedRights Send-As -user "domain\username" it continues to fail with this error (running in EMS):
Active Directory operation failed on ert-dc05.domain.COM. This error is not retriable. Additional information: Access is denied.
Active directory response: 00000005: SecErr: DSID-03152612, problem 4003 (INSUFF_ACCESS_RIGHTS), data 0
+ CategoryInfo : WriteError: (0:Int32) [Add-ADPermission], ADOperationException
+ FullyQualifiedErrorId : 415E0D31,Microsoft.Exchange.Management.RecipientTasks.AddADPermission
My account is a member of the domains admin group and organization management in exchange. I can run this same command with no issues when running for "Send As" permissions on a mailbox but now a distribution group. Any suggestions on what may cause this? I can go into ADUC and does this with the GUI but not in shell for some reason.