F-SECURE ANTI-VIRUS FOR MICROSOFT EXCHANGE 7.10 Administrator's Manual page 288

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5. Change permissions as follows:
a. Remove all existing groups and users.
a. Add Administrator, Exchange Domain Servers and SYSTEM to
the Group or user names list.
b. Grant Change and Read permissions for Exchange Domain
Servers and SYSTEM.
c. Grant Full Control, Change and Read permissions for the
Administrator account.
Click OK to continue.