The server to which the application is connected cannot impersonate the requested user due to insufficient permission. EWS

Hi :

I am using Exchange Web Service to access mailboxes in Exchange 2007.

I have created new mailbox on Exchange, given Manage Full Access Permissions for domain admin.

After that, I ran following command successfully in Exchange Management Shell,

Get-ClientAccessServer | Add-ADPermission -User "exchdomain.com\read07" -ExtendedRights ms-Exch-EPI-Impersonation,ms-Exch-EPI-May-Impersonate -Inheritancetype none

I have checked on web, there are some links which tells to run this command on powershell, I tried it with failure(no such command).

Then I have tried accessing folders using service.FindFolders but it gives "The server to which the application is connected cannot impersonate the requested user due to insufficient permission".

Is there any missing? Please suggest.

Thanks,

Ravindra