Thanks for the quick response! I have set group 772 to overflow to 5 (renumbered from 770) after 20 seconds and set number of calls to 99. I changed the COS of mailbox 772 to 3 however the call never seems to overflow to the VM, it will just ring continuously. Is there anything else I should check for? I have gotten this to work on a later Magix release but this one is leaving me scratching my head!

Thanks for the help!