MSExchange

Avast Free Antivirus / Premium Security
1

What is MS Exchange and outlook exchange provider function.

2

It is for users of either MS Outlook (not express) or MS Exchange email clients.
So unless you use either of these you don’t need it enabled.

Extract from avast! help file (very informative document).

[b]Outlook/Exchange - Provider Settings[/b]

This setting affects MS Outlook and MS Exchange mail clients only. For setting up the other mail clients, such as Outlook Express, Eudora etc., see Internet Mail Provider.

  • Normal. Default setting.
  • High. In addition to the default setting, even read messages are scanned on open and the heuristic sensitivity is set to High.