Set closed_by to system

[samadam]

I am trying to set closed_by to system in a scheduled job that would automatically close the record that match certain conditions. How can I do that? There is no System Admin in the User table but  job runs as system. Tried to set displayvalue to system and it did not work. Any way to set this?

[Ankur Bawiskar]

@samadam 

Hope you are doing good.

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[samadam]

No luck, I tried to set the value but it is still empty. Tried to use set Value as well. no luck