SQL policy vs expiration

What is the difference between SQL password policy and password expiration? What happens if I enable only password policy but not expiration?
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Nakul VachhrajaniTechnical Architect, Capgemini IndiaCommented:
The password policy governs the password complexity requirements (E.g. a password must be minimum 8 characters in length and so on). You may read more about this here: https://docs.microsoft.com/en-us/sql/relational-databases/security/password-policy?view=sql-server-2017

Password expiration dictates that the password "expires" and must be reset after a certain number of days.

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Vitor MontalvãoMSSQL Senior EngineerCommented:
Password policy is from the Windows OS, meaning that SQL Server will use the Windows Password Policy instead of the SQL Server Password Policy.
If you want to have a different policy then configure your own SQL Server Password Policy and use that one.
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