Question : Setting msExchMailboxSecurityDescriptor with VB.NET

Hello,

I am trying to add a new security descriptor to a mailbox in order to grant another account full rights to it. I currently add a normal security descriptor via this method:

Protected Sub SetFullMbxPerms(ByVal user As DirectoryEntry, ByVal trustee As SecurityIdentifier)

Dim userSecurity As ActiveDirectorySecurity = user.ObjectSecurity

Dim fullMbxControl As New ActiveDirectoryAccessRule(trustee, _
ActiveDirectoryRights.GenericAll, AccessControlType.Allow, _
ActiveDirectorySecurityInheritance.SelfAndChildren)

userSecurity.AddAccessRule(fullMbxControl)
user.CommitChanges()

End Sub

However, this is only getting me the Active Directory security and not the mailbox security. How can I accomplish this through vb.net and modify the msExchMailboxSecurityDescriptor similiar to what I have done above?

Thanks,
Ron

Answer : Setting msExchMailboxSecurityDescriptor with VB.NET

Ok, this works using DirectoryEntry and cdoexm

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    Sub SetExMbxPerms2(ByVal user As DirectoryEntry, ByVal trustee As String)

        Const ADS_ACEFLAG_INHERIT_ACE = 2
        Const ADS_RIGHT_DS_CREATE_CHILD = 1
        Const ADS_ACETYPE_ACCESS_ALLOWED = 0

        Dim dacl As New AccessControlList
        Dim mailboxRights As New SecurityDescriptor
        Dim ace As New AccessControlEntry
        Dim mailbox As CDOEXM.IExchangeMailbox = user.NativeObject

        mailboxRights = mailbox.MailboxRights

        dacl = mailboxRights.DiscretionaryAcl

        ace.AccessMask = ADS_RIGHT_DS_CREATE_CHILD
        ace.AceType = ADS_ACETYPE_ACCESS_ALLOWED
        ace.AceFlags = ADS_ACEFLAG_INHERIT_ACE
        ace.Flags = 0
        ace.Trustee = trustee
        Console.WriteLine(dacl.AceCount)
        dacl.AddAce(ace)
        Console.WriteLine(dacl.AceCount)
        mailboxRights.DiscretionaryAcl = dacl
        mailbox.MailboxRights = mailboxRights
        user.CommitChanges()

    End Sub