Per-Connector Message Type and Priority Limiting

You can specify which messages can use a particular connector based on message type or priority. For each connector, you can prohibit system, non-system, urgent (high importance), normal, or non-urgent (low importance) messages. You can also specify that urgent messages override the schedule for a connector and are sent immediately; other messages remain in the queue until the next scheduled time.

The per-connector message limits are set on each connector object by editing the raw properties of the connector. The limits are set using the Heuristics attribute. The value of the Heuristics attribute is the decimal integer sum of the following values for each limit you want to set.

Limit	Decimal Value
Prohibit system messages	4096
Prohibit non-system messages	8192
Prohibit urgent (high importance) messages	16384
Prohibit normal messages	32768
Prohibit non-urgent (low importance) messages	65536
Override schedule for urgent messages	131072

To set the per-connector limits

Run the Microsoft Exchange Administrator program in raw mode by typing C:\Exchsrvr\Bin\Admin /r at a command prompt.
In the Administrator window, choose the site where the connector is installed, and then choose Connections.
Select the connector.
From the File menu, choose Raw Properties.
In the List attributes of type box, select All.
In the Objects attributes box, select Heuristics.
Type the sum of the values for the limits you want to set in the Edit value box, and then choose Set.