If you're having issues with your CDK login, it might be because you've been moved to CDK Unify. Please follow the steps in the instructions to resolve this.
Sign-In Instructions: https://scribehow.com/shared/How_to_Sign_In_to_CDK_Unify__7utAS43bQg6m1FEPXLiqLQ

Some troubleshoot links
CDK App asking for login Fix: https://scribehow.com/shared/CDK_Unify__CDK_App_asking_for_login_Fix__FQ6L9CWHQGiEtTalwn4jig
Edge Asking for login Credentials Fix: https://scribehow.com/shared/CDK_Unify__Edge_Asking_for_login_Credentials_Fix__5kYE2z_1RzWFEdD8exo82A

Currently all CDK applications are down, they are working to resolve the problem as soon as they can.

We are aware of the CDK issue being experienced at the moment and are unable to help with this specific issue. Please do not submit any tickets or call CDK as we already are speaking with them to resolve the issue and creating another support ticket with them will only slow things down. We appreciate your patience, and we will post here once CDK is up and running again. Thank you.

Info! Please be aware when submitting a ticket to terminate a user. The IT department only has access to remove CDK, email, Vin Solutions and Vauto accounts, as for any other accounts that may need to be removed you are responsible for as we do not have access to most dealership systems such as FMC Dealer, GM Global, etc. Thank you and sorry for any inconvenience this may cause.

Phone Issues! If your phone is not making or receiving calls unplug the top cable for about 10 seconds and plug it back in and wait for it to reboot. If your phone has been logged off and you need to log it back in the code for every phone is the first 2 digits of your extension followed by 1234 (e.g., Ext=60555 Passcode=601234).