how to set session time out for content authors in Sitecore 10.2?

Not able to set session time out in Sitecore 10.2.

If I leave the browser open for more than 20 minutes with the launchpad displayed and then click on any button after that, I expect the session timeout to occur and log me out automatically. But this doesn't happen as I expect.

Is there a way to force a session timeout logout?

You have to update the `CookieLifetime` and `IdentityTokenLifetimeInSeconds` configuration settings for your Sitecore Identity Server site in `..{your_identity_server_root_folder}\sitecore\Sitecore.Plugin.IdentityServer\Config\identityServer.xml`:

```
<Settings>
<Sitecore>
<IdentityServer>
...
<Authentication>
<!-- Sets the identity server cookie lifetime -->
<CookieLifetime>0.00:25:00</CookieLifetime>
...
</Authentication>

...

<Clients>
<DefaultClient>
...
<IdentityTokenLifetimeInSeconds>1500</IdentityTokenLifetimeInSeconds>
...
</DefaultClient>
...
</Clients>
</IdentityServer>
</Sitecore>
</Settings>

```


By default both settings are set to 25 minutes and you can adjust them for your needs at any time. If you have a requirement to log out your Sitecore Admin Users automatically if they are not using the Sitecore Admin for more than 20 minutes then set `CookieLifetime` to "0.00:20:00" and `IdentityTokenLifetimeInSeconds` to "1200".


Once amended the config settings please remember to restart your Sitecore Identity Server site as it will only read the new settings on the start.