After synchronizing groups, valid recipients and email aliases from the source directory to the Trend Micro Email Security server, perform the following:
  • Configure policies on the Trend Micro Email Security server for the newly imported groups.
    See Configuring Policies in the Trend Micro Email Security Online Help for details.
  • Enable Trend Micro Email Security to perform the valid recipient check on the Directory Management screen (Administration → Directory Management).
    See About Directory Management in the Trend Micro Email Security Online Help for details.
  • Configure the primary email alias to receive digest email messages. As a result, digest email messages will not be delivered to other associated email aliases.