Execute the following Microsoft SQL Server Transact-SQL (T-SQL) script in Management Studio (SSMS) Query Editor, SQLCMD or other client software to create a sproc for 15 minutes shutdown sequence:

USE AdventureWorks
GO

CREATE PROC SQLServerShutdown

AS
BEGIN
EXEC xp_cmdshell 'net send /DomainX:DEVELOPERS ''Development SQL Server 2005 shutting down
in 15 minutes. Finish up your work.', no_output

EXEC xp_cmdshell 'net pause MSSQL$SQL5'

WAITFOR DELAY '00:10:00'

EXEC xp_cmdshell 'net send /DomainX:DEVELOPERS ''Development SQL Server 2005 shutting down
in 5 minutes. Exit soon.', no_output

WAITFOR DELAY '00:04:00'

EXEC xp_cmdshell 'net send /DomainX:DEVELOPERS ''Development SQL Server 2005 shutting down
in 1 minute. Log off now.', no_output

WAITFOR DELAY '00:01:00'

EXEC xp_cmdshell 'net stop MSSQL$SQL5', no_output
END
GO