Im facing a problem with Call Forwarding All on CCM 4.1.3 sr3c. I'm able to forward the extension to the desired destination, but the forwarding actually doesn't get in effect and when I call the forwarded phone it just rings. Moreover the phones don't let me remove the Forwarding setting. This problem seems to be present on all the extensions and IP Phones on the CCM Cluster.
Thank you for your time.
Here are some good troubleshooting docs for Call Forward All;
Cisco CallManager Issues with Call Forward All
From this good doc;
Field Notice: Call Forwarding Failure After a Cisco CallManager 4.x Unexpected Shutdown
Hope this helps!