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In case the HTTPS scan option is enabled on the proxy server, requests generated by Kaspersky Security 9.x for Microsoft Exchange Servers will be blocked. In this event, te application logs the following message:
Error AntispamEngine: tpprov [ConnectionTmpl.h:133] eka::SystemException caught: .\src\ProxyAuthorizationUtil.cpp(178) SystemException - basic auth failed. http ret code:407: 0x80000045 (Access denied)
This occurs because the KSN (Kaspersky Security Network) service and the Enforced Anti-Spam Update Service use port 443 for connecting to public Kaspersky Lab servers.
To ensure the correct work of the services of Kaspersky Security 9.x for Microsoft Exchange Servers, it is necessary to create a special allowing rule or disable HTTPS traffic scan.
To disable HTTP traffic scan on Forefront TMG, follow these steps:
Release of antivirus database updates (required to protect your computer/server/mobile device)
Providing technical support over phone / web
Release of patches for the application (addressing detected bugs)
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