I can access my e-mail account, but the tasks I set up are apparently stored only locally. Ie. Tasks that I put on the computer are not displayed on the laptop. What do I have to do to work on both devices?
So in fact it depends on whether your e-mail provider offers an interface, so tasks / appointments are stored at the e-mail provider. Many use CalDav there, which works well in itself. You should therefore first look, if this is your e-mail provider and then look at your e-mail providers, how to do this, for example. In Thunderbird set up. Then there should be nothing in the way.
How do I set up this CalDav? I have just seen that my provider has an extra URL for something like that
This is quite different, normal e-mail providers also provide instructions there. Otherwise "googling" I would say, there are always instructions. So if you use Thunderbird, search for "Thunderbird + CalDav setup".
