I know this is an 8 month old post, but I just found my self on the same situation. Well, the solution (at least for me) was really simple. But this has to be done in the DC, you have to edit your Default Domain Policy or create a new one with the following:
Computer Configuration > System > Credentials Delegation
- Allow delegating default credentials with NTLM-only server authentication
- Enabled > Add servers to the list > Show > add TERMSRV/*
The same goes to "Allow delegating saved credentials with NTLM-only server authentication"
Computer Configuration > System > Credentials Delegation
- Allow delegating saved credentials with NTLM-only server authentication
- Enabled > Add servers to the list > Show > add TERMSRV/*
After this, in the DC just force a gpupdate and do the same on the computer you need to use the saved credentials.
This worked for me in an Windows Server 2012 R2 environment.
Hope it helps in the future.
Regards!