Event ID - 1002

Event Id1002
SourceNotificationServices
DescriptionNotification Services failed to open a connection to SQL Server.
Event InformationAccording to Microsoft:
Cause:

This error occurs when Notification Services is unable to establish a connection to SQL Server. The event log entry for this error contains details on the cause of the event.
User Action :
First, verify that SQL Server is running. The NS$<instance_name> service can be configured to use either Windows integrated security or a SQL Server user name and password to connect to SQL Server. In either case, verify that the account used has permissions to connect to a SQL Server computer.</instance_name> .
Reference LinksNotification Services failed to open a connection to SQL Server

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