DPM 2010: Error 346 - Special Subtleties
- Tutorial
- Recovery mode

Most often this problem is solved by unchecking this checkbox:

But it happens that it does not work, and does not want to work in any way. A solution to the problem was found in one far-off English forum: Another sidenote: make sure the DPM server isn't included in the Management Console system policy, as that picks up the DPM traffic before the rule created by in this post and will cause communication to fail .
In the Russian-language version of TMG, this turns into a "rule for allowing control using the MMC console", which is located in the system policies, is one of the first, then it is processed earlier than removing the checkmark will help us.
And do not forget to enable the display of system policies through the menu item - VIEW.

And it works!
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