You say this is SIP. Is Unity using PIMG or TIMG to integrate with the Mitel or are you going through a SIP trunk? We need more details before going forward. Also, what version of Exchange are you using and is it on the Unit or off the Unity on it's own server?
In addition to what Tray mentioned, you can also validate the Unity Integration to the Mitel phones. This should be the first PBX integration before the CallManager one. Go into UTIM on the Unity server and expand the integration displayed, it may be TIMG or PIMG. In ours, you can click on the PIMG integration and click "Verify", which pings the device. If you have such an integration, make sure you have one of the ports enabled and checked for Dialout MWI.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...