Dynamics 365 for Outlook Plugin prompt for Username/Password after IFD Setup

Hi, all users are getting the username/password prompt different times when they try to configure the CRM Outlook plugin. After skipping the prompt several times, the plug get configured correctly.

The users can browse the CRM site with no issues with different browsers

This happen since we configured IFD.

Info| Error connecting to URL: https://<url>/XRMServices/2011/Organization.svc Exception: Microsoft.Crm.Outlook.ClientAuth.CrmClientAuthException: Authentication was canceled.
Info| IFD (https) org service connection failed. Exception: Authentication was canceled.
Info| Error connecting to URL: https://<url>/XRMServices/2011/Discovery.svc Exception: Microsoft.Crm.Outlook.ClientAuth.CrmClientAuthException: Authentication was canceled.
Error| Exception : Authentication was canceled. bei Microsoft.Crm.Application.Outlook.Config.DeploymentsInfo`1.InternalLoadOrganizations(DataCollection`1 orgs, AuthUIMode uiMode, Control parentWindow)
Info| Error connecting to URL: https://<url>/XRMServices/2011/Organization.svc Exception: Microsoft.Crm.Outlook.ClientAuth.CrmClientAuthException: Authentication was canceled.
Info| IFD (https) org service connection failed. Exception: Authentication was canceled.
Error connecting to URL: https://<url>/XRMServices/2011/Discovery.svc Exception: Microsoft.Crm.Outlook.ClientAuth.CrmClientAuthException: Authentication was canceled.
Error| Exception : Authentication was canceled. bei Microsoft.Crm.Application.Outlook.Config.DeploymentsInfo`1.InternalLoadOrganizations(DataCollection`1 orgs, AuthUIMode uiMode, Control parentWindow)

Our setup:
Dynamics 365 9.0.10.11
On Premise deployment configured for IFD+On Premise
Outlook Plugin 9.0.2.426

Any help?