Merge pull request #9880 from mashokMicrosoft/mashok/group-calendar-readonly-note

docs: add note about read-only group calendar container properties

Author: Lauragra

api-reference/beta/api/calendar-update.md

@@ -61,6 +61,9 @@ In the request body, supply the values for relevant fields that should be update
 |isDefaultCalendar|Boolean|True if this calendar is the user's default calendar, false otherwise.|
 |name|String|The calendar name.|
 
+> [!IMPORTANT]
+> Calendar container properties in group calendars are read-only and can't be modified. `PATCH` requests that target these properties fail with a `405 Method Not Allowed` response.
+
 ## Response
 
 If successful, this method returns a `200 OK` response code and updated [calendar](../resources/calendar.md) object in the response body.

api-reference/v1.0/api/calendar-update.md

@@ -59,6 +59,9 @@ In the request body, supply the values for relevant fields that should be update
 |isDefaultCalendar|Boolean|True if this calendar is the user's default calendar, false otherwise.|
 |name|String|The calendar name.|
 
+> [!IMPORTANT]
+> Calendar container properties in group calendars are read-only and can't be modified. `PATCH` requests that target these properties fail with a `405 Method Not Allowed` response.
+
 ## Response
 
 If successful, this method returns a `200 OK` response code and updated [calendar](../resources/calendar.md) object in the response body.