If i try this:
it'll return to the dashboard.
Magento Stack Exchange is a question and answer site for users of the Magento e-Commerce platform. It only takes a minute to sign up.Sign up to join this community
The admin uses some secret keys in the URL generated based on the URL and a random string that depends on the session in order to avoid CSRF attacks.
But you can generate the url to the customer edit page in a block or template on the admin side like this:
$url = $this->getUrl('customer/index/edit', ['id' => 1]);