+Non-persistent session tokens have a Max Inactive Time of 24 hours whereas persistent session tokens have a Max Inactive Time of 180 days. Any time the SSO session token is used within its validity period, the validity period is extended another 24 hours or 180 days. If the SSO session token is not used within its Max Inactive Time period, it is considered expired and will no longer be accepted. Any changes to this default periods should be change using [Conditional Access](../conditional-access/howto-conditional-access-session-lifetime.md).
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