CDavExchangeClient::AuthenticateBasic

private function AuthenticateBasic($arBasicRequest, $request, $response, $verb = "Authorization")
{
	// realm="test-exch2007"

	$request->SetHeader(
		$verb,
		sprintf(
			"Basic %s",
			base64_encode($this->userName.":".$this->userPassword)
		)
	);

	return $request;
}