Cached Credentials Utility does not have Popup Dialogue Box in RDP connection

So you have workstations that are not connected to a network with a DC available that users RDP into? Please Explain your uses case. 

we have source and target domain and while taking RDP for any machine getting authentication with my domain, no issue from client and DC

we are using CCU tool for computer migration, after install CCU tool " target user credential dialogue box" (CCU pop-up) is not appear if we take RDP session but normal login like just login client working fine for CCU pop-up dialogue box.

anyone know why CCU pop-box is not appear when we take RDP session ? how to fic this issue ?

CCU popup will not appear when RDP is used. To fix the issue use something other than RDP, such as anydesk or teamviewer.

This is a Microsoft limitation, not a QMM limitation.

CCU is designed to migrate a workstation that is remote from the local network with domain controller. This is not a case when the users would be using RDP to access their workstation. End users do not RDP into their laptops. 

My question again is what are you migrating that the end users are using RDP for access?