diff --git a/homeassistant/components/ecobee/__init__.py b/homeassistant/components/ecobee/__init__.py
index 7204dbf8de2..31a1e753fc6 100644
--- a/homeassistant/components/ecobee/__init__.py
+++ b/homeassistant/components/ecobee/__init__.py
@@ -5,13 +5,21 @@ from pyecobee import ECOBEE_API_KEY, ECOBEE_REFRESH_TOKEN, Ecobee, ExpiredTokenE
 import voluptuous as vol
 
 from homeassistant.config_entries import SOURCE_IMPORT, ConfigEntry
-from homeassistant.const import CONF_API_KEY
+from homeassistant.const import CONF_API_KEY, CONF_NAME, Platform
 from homeassistant.core import HomeAssistant
-from homeassistant.helpers import config_validation as cv
+from homeassistant.helpers import config_validation as cv, discovery
 from homeassistant.helpers.typing import ConfigType
 from homeassistant.util import Throttle
 
-from .const import _LOGGER, CONF_REFRESH_TOKEN, DATA_ECOBEE_CONFIG, DOMAIN, PLATFORMS
+from .const import (
+    _LOGGER,
+    ATTR_CONFIG_ENTRY_ID,
+    CONF_REFRESH_TOKEN,
+    DATA_ECOBEE_CONFIG,
+    DATA_HASS_CONFIG,
+    DOMAIN,
+    PLATFORMS,
+)
 
 MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=180)
 
@@ -30,7 +38,9 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     migrating from the old ecobee integration. Otherwise, the user will have to
     continue setting up the integration via the config flow.
     """
+
     hass.data[DATA_ECOBEE_CONFIG] = config.get(DOMAIN, {})
+    hass.data[DATA_HASS_CONFIG] = config
 
     if not hass.config_entries.async_entries(DOMAIN) and hass.data[DATA_ECOBEE_CONFIG]:
         # No config entry exists and configuration.yaml config exists, trigger the import flow.
@@ -63,6 +73,16 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
 
     await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)
 
+    hass.async_create_task(
+        discovery.async_load_platform(
+            hass,
+            Platform.NOTIFY,
+            DOMAIN,
+            {CONF_NAME: entry.title, ATTR_CONFIG_ENTRY_ID: entry.entry_id},
+            hass.data[DATA_HASS_CONFIG],
+        )
+    )
+
     return True
 
 
diff --git a/homeassistant/components/ecobee/const.py b/homeassistant/components/ecobee/const.py
index b4e0c485e45..4a318f2be3c 100644
--- a/homeassistant/components/ecobee/const.py
+++ b/homeassistant/components/ecobee/const.py
@@ -20,8 +20,9 @@ _LOGGER = logging.getLogger(__package__)
 
 DOMAIN = "ecobee"
 DATA_ECOBEE_CONFIG = "ecobee_config"
+DATA_HASS_CONFIG = "ecobee_hass_config"
+ATTR_CONFIG_ENTRY_ID = "entry_id"
 
-CONF_INDEX = "index"
 CONF_REFRESH_TOKEN = "refresh_token"
 
 ECOBEE_MODEL_TO_NAME = {
diff --git a/homeassistant/components/ecobee/notify.py b/homeassistant/components/ecobee/notify.py
index a8f53a027b3..75d1316f0e3 100644
--- a/homeassistant/components/ecobee/notify.py
+++ b/homeassistant/components/ecobee/notify.py
@@ -1,31 +1,33 @@
 """Support for Ecobee Send Message service."""
-import voluptuous as vol
 
-from homeassistant.components.notify import PLATFORM_SCHEMA, BaseNotificationService
-import homeassistant.helpers.config_validation as cv
+from homeassistant.components.notify import ATTR_TARGET, BaseNotificationService
 
-from .const import CONF_INDEX, DOMAIN
-
-PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
-    {vol.Optional(CONF_INDEX, default=0): cv.positive_int}
-)
+from .const import DOMAIN
 
 
 def get_service(hass, config, discovery_info=None):
     """Get the Ecobee notification service."""
+    if discovery_info is None:
+        return None
+
     data = hass.data[DOMAIN]
-    index = config.get(CONF_INDEX)
-    return EcobeeNotificationService(data, index)
+    return EcobeeNotificationService(data.ecobee)
 
 
 class EcobeeNotificationService(BaseNotificationService):
     """Implement the notification service for the Ecobee thermostat."""
 
-    def __init__(self, data, thermostat_index):
+    def __init__(self, ecobee):
         """Initialize the service."""
-        self.data = data
-        self.thermostat_index = thermostat_index
+        self.ecobee = ecobee
 
     def send_message(self, message="", **kwargs):
         """Send a message."""
-        self.data.ecobee.send_message(self.thermostat_index, message)
+        targets = kwargs.get(ATTR_TARGET)
+
+        if not targets:
+            raise ValueError("Missing required argument: target")
+
+        for target in targets:
+            thermostat_index = int(target)
+            self.ecobee.send_message(thermostat_index, message)