private void EnableDisable()
{
buttonEdit.Enabled = listAliases.SelectedItems.Count == 1;
buttonRemove.Enabled = listAliases.SelectedItems.Count > 0;
textMaxNumberOfAccounts.Enabled = checkMaxNumberOfAccountsEnabled.Checked;
textMaxNumberOfAliases.Enabled = checkMaxNumberOfAliasesEnabled.Checked;
textMaxNumberOfDistributionLists.Enabled = checkMaxNumberOfDistributionListsEnabled.Checked;
radioSMSetIfNotSpecifiedInAccount.Enabled = checkSignatureEnabled.Checked;
radioSMOverwriteAccountSignature.Enabled = checkSignatureEnabled.Checked;
radioSMAppendToAccountSignature.Enabled = checkSignatureEnabled.Checked;
}