service account needs a login?

should the sql server service account be given a login in syslogins?
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25112Author Commented:
in the errlog, I see this error:

Login failed for <domain user (service account)>. Reason: Failed to open the explicitly specified database. [CLIENT: <local machine>]

why may service account trying to login?
25112Author Commented:
no, I am asking if there is a need for service account be to be in syslogins (regardless of sa privilege or not). is there any pros/cons to it?
Pushpakumara MahagamageVPCommented:
I haven't seen any need. i'm using separate AD accounts for SQL Server instance and that service account does not exist in syslogins.

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Microsoft SQL Server 2008

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