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Thank you for advance.
I created a widows service for mail schedule with c#.net and sql server 2005 and it is working fine for past one year.
now sometimes i am getting the "System.Data.SqlClient.SqlException:
Login failed for user '<UserName>'. Reason: The account is
then i restarted the windows service manually and working.
what is the problem in my sql server connection and how to fix that issue?