I am having some issues with MWI on unity 8. (CUCM Version 8.0) They dont come on or off .. however the email notification works fine.. in the windows event viewer i get a CiscoUnity_Notifier :
Failed to set message waiting lamp for username, ext 4221, switch 0, cluster 0, reason: SetMWI failed with [0x80004005; E_FAIL].
I Have resync'd the MWI no joy.. anyone seen this before?? any help will be appriciated