Explanation
The Interactive logon: Number of previous logons to cache (in case domain controller is not available) policy setting determines whether a user can log on to a Windows domain by using cached account information.
Logon information for domain accounts can be cached locally so that, if a domain controller cannot be contacted on subsequent logons, a user can still log on.
References:
https://docs.microsoft.com/en-us/windows/security/threat-protection/security-policy-settings/interactive-logon-nu