After a recent upgrade to IOS 12.4(15)T1 & CME 4.1, the DND feature no longer works on any of the phones. The softkey is there, but pressing it does nothing.
Is this a known issue or does anyone have a solution for this? We need the DND key to ensure calls are forwarded while staff are out.
Alternatively, if there is no solution, am I likely to run into problems running CME 4.0 under IOS 12.4(15)T1?