When a virus or spam is detected in a message passing through a Microsoft Exchange Server Hub Transport role, a special prefix is added to the subject of the email. In some cases, this can corrupt the subject in the email or in the delivery report (any version of Microsoft Exchange Server can be affected):
It is a Microsoft Exchange Server operation issue, not related to Kaspersky Lab products.
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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