important pointers added

Author: ApnaLakshay

articles/update-manager/manage-pre-post-events.md

@@ -40,6 +40,8 @@ For example, if a maintenance schedule is set to start at **3:00 PM**, with the
 |6:55 PM | The post event gets triggered after the defined maintenance window completes. If you have defined a shorter maintenance window of 2 hrs, the post maintenance event will trigger after 2 hours and if the maintenance schedule is completed before the stipulated time of 2 hours that is, in 1 hr 50 mins, the post event will start. </br></br> In this example, if the maintenance window is set to the maximum, then by 6:55 PM the patch installation process is complete and if you have a shorter maintenance window, the patch installation process is completed by 5:00 PM. |
 |7:15 PM| After the patch installation, the post event runs for 20 mins. </br>In this example, the post event is initiated at 6:55 PM and completed by 7:15 PM and if you have a shorter maintenance window, the post event is triggered at 5:00 PM and completed by 5:20 PM. |
 
+>[!IMPORTANT]
+> Make sure to allocate atleast 40 minutes before the scheduled maintenance run time (3:00 PM in above example) otherwise it might lead to auto-cancellation of the particular scheduled run.
 
 ## Configure pre and post events on existing schedule
 
@@ -109,6 +111,9 @@ There are two types of cancelations:
 
 > [!NOTE]
 > If the cancelation is done by the system, the upcoming scheduled patching job will be canceled due to the failure of running the pre events by the sytem.
+
+>[!IMPORTANT]
+> If the scheduled maintenance job is cancelled by the user using cancelation API or by the system due to any internal failure, post event if subscribed, will be sent to the endpoint configured by the user.
  
 ### View the cancelation status