The Options
You can disable this behavior in Unity and you have 2 options. You should know upfront that either option applies system-wide.
Option A) You can exclude Read and Delivery receipts only (recommended).
Option B) Disable ALL receipts including non-delivery receipts.
If you send someone a voicemail and it can’t be delivered for some reason, it may actually be handy to receive a non-delivery receipt for those messages. So, that’s why Option A is generally recommended but both options are explained below.
Background
So, why does this happen in the first place? In earlier versions of Unity, there are 2 registry keys (1 for each option above) at play. By default, the value of each is 0 (include receipts). Alternatively, these values can also be missing which results in the same behavior.
- HKLM>Software>Active Voice>Conversations>1.0>Exclude Return Receipts
- HKLM>Software>Active Voice>Conversations>1.0>Exclude All Receipts
To fix the problem, you modify one of these two registry keys and the best way to modify the registry on Unity is to use the Advanced Settings Tool.
What did I mean by “earlier versions of Unity”? In Unity 5.0(1) ES45, 5 registry keys, including those above, were moved from the registry to the SQL database. This means that the Advanced Settings Tool was updated to accommodate these changes.
Tip: Launch the Advanced Settings Tool and then select “Conversation – Exclude Return Receipts (Exchange only)”. In the Description column, read the Notes. If they specify that these settings work for “Unity 5.0(1) with ES45 installed”, the tool installed on your system has been updated to make changes in the SQL database.
The Next Steps
If you have an older version of Unity and do not have an updated Advanced Settings Tool, then proceed.
If you have an older version of Unity, such as a base installation of 5.0(1), but have the updated Advanced Settings Tool then I’d recommend you just install the latest Unity ES first and then proceed. However, you could also modify the registry directly. Just remember that your settings will be lost if you do install a Unity ES (depending on the version).
If you have a recent version of Unity and do not have an updated Advanced Settings Tool, download and install the latest version from www.ciscounitytools.com and proceed.
If you have a recent version of both Unity and the Advanced Settings Tool, then proceed.
The Fix
Launch the Advanced Settings Tool from Unity Tools Depot and select 1 of the following:
Option A) Select “Conversation – Exclude Return Receipts (Exchange only)”
Option B) Select “Conversation – Exclude All Receipts (Exchange only)”
Set the value of the option you choose to 1 using the Advanced Settings Tool and restart Unity. Please note that these values do not affect the behavior of the Unity Inbox. The Advanced Settings Tool highlights this as well. If you want to exclude return receipts from there as well, set the “Unity Inbox – Exclude return receipts from Inbox” parameter to 1 and restart Unity.
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