Hi Eric
A few things we need to find out to determine the cause
- Is the Call Manager AD integrated?
- Are you using DNS, if so ensure that reverse lookup is configured
- Have you ran the desktop administrator from the UCCX before installing the client?
- Is the phone extension your logging into unique or is there another number in the CUCM with the same extension.
You could also be hitting the following defect: CSCth96226
- Ensure in the regedit the spanlink ior host is pointed to the UCCX.
- Disable windows firewall and antivirus
- Ping the UCCX from the client PC should all this be working then you want to look at the CAD logs after enabling it to debug level.