Error creating Exchange 2016 connector

Hi,

I'm trying (OneIdentity 8.2.1) to create an Exchange 2016 connector. I check the DNS and it works, I put the user credential and I select the organization and it seems go fine, but when I click on next to create the connector I get the following error message:

The running command stopped because the preference variable "ErrorActionPreference" or common parameter is set to Stop: [it01exch01.ictdomain.local] Connecting to remote server it01exch01.ictdomain.local failed with the following error message : The WinRM client received an HTTP status code of 403 from the remote WS-Management service. For more information, see the about_Remote_Troubleshooting Help topic.

I checked the all permissions on Exchange for the service user and I have all of them.

Do you know which the problem could be?

Thanks,

Roberto