You can use Kaspersky Security Center to centrally download updates for the Anti-Virus and Anti-Spam databases. If this is the case, update packages will be saved in a network folder and will be relayed to the application over the internal corporate network. This method lets you reduce external network traffic and optimize application database updates on protected servers whose network settings block access to external network resources.
To configure this method for updating application databases:
Make sure that the network settings allow data transfer between the selected network folder and the protected Microsoft Exchange servers.