How to set asp.net Identity cookies expires time

If IsPersistent property of AuthenticationProperties is set to false, then the cookie expiration time is set to Session.

If checkbox "remember me" is checked then AuthenticationManager.SignIn(new AuthenticationProperties{ IsPersistent = true }, userIdentity); will create a cookie with expiration time equal to ExpireTimeSpan you set up in Startup.cs (defaults to 14days).

If checkbox "remember me" is NOT checked then you have to use AuthenticationManager.SignIn(new AuthenticationProperties{ IsPersistent = true, ExpiresUtc = DateTimeOffset.UtcNow.AddMinutes(30)}, userIdentity);. Again IsPersistent is set to true but now we give a value to ExpiresUtc so it does not use from CookieAuthenticationOptions from Startup.cs.

public override async Task SignInAsync(ApplicationUser user, bool isPersistent, bool rememberBrowser){    var userIdentity = await CreateUserIdentityAsync(user).WithCurrentCulture();    // Clear any partial cookies from external or two factor partial sign ins    AuthenticationManager.SignOut(DefaultAuthenticationTypes.ExternalCookie, DefaultAuthenticationTypes.TwoFactorCookie);    if (rememberBrowser)    {        var rememberBrowserIdentity = AuthenticationManager.CreateTwoFactorRememberBrowserIdentity(ConvertIdToString(user.Id));        AuthenticationManager.SignIn(new AuthenticationProperties { IsPersistent = isPersistent }, userIdentity, rememberBrowserIdentity);    }    else    {        //AuthenticationManager.SignIn(new AuthenticationProperties { IsPersistent = isPersistent }, userIdentity);        if (isPersistent)        {            AuthenticationManager.SignIn(new AuthenticationProperties { IsPersistent = true }, userIdentity);        }        else        {            AuthenticationManager.SignIn(new AuthenticationProperties { IsPersistent = true, ExpiresUtc = DateTimeOffset.UtcNow.AddMinutes(30) }, userIdentity);        }            }}

Use this...

public void ConfigureAuth(IAppBuilder app){  app.UseCookieAuthentication(new CookieAuthenticationOptions  {      ExpireTimeSpan = TimeSpan.FromHours(1),  });            }

In order to achieve the feature you are describing in ASP.NET Core 3.1, I configure authentication in Startup in the following way:

        services.ConfigureApplicationCookie(o =>        {            ...            o.ExpireTimeSpan = TimeSpan.FromMinutes(30);            o.SlidingExpiration = true;            ...            o.Events.OnSigningIn = ctx =>            {                if (ctx.Properties.IsPersistent)                {                    var issued = ctx.Properties.IssuedUtc ?? DateTimeOffset.UtcNow;                    ctx.Properties.ExpiresUtc = issued.AddDays(14);                }                return Task.FromResult(0);            };        });

Using the OnSigningIn callback, I explicitly set the expiration date to now + 14 days if the "isPersistent" check-box is clicked.