See the information about Debian Edu specific file system access configuration before adding users.
Log into the server - with the root account you cannot log in graphically.
There is additional information available elsewhere in this manual: the New features in Stretch chapter should be read by everyone who is familiar with previous releases. And for those upgrading from a previous release, make sure to read the Upgrades chapter.
If you are using a new Debian Edu Stretch machine, the site certificate will be known by the browser.
First, click on "Users" in the left navigation menu. The right side of the screen will change to show a table with department folders for "Students" and "Teachers" and the account of the GOsa² Super-Administrator (the first created user). Above this table you can see a field called Base that allows you to navigate through your tree structure (move your mouse over that area and a drop-down menu will appear) and to select a base folder for your intended operations (e.g. adding a new user).
When using the "Filter" box, results will immediately appear in the middle of the text in the table list view. Every line represents a user account and the items farthest to the right on each line are little icons that provide actions for you: cut entry, copy entry, edit user, lock account, set password, take snapshot (not usable) and remove user.
info: Create GOsa machine for auto-mac-00-04-76-d3-28-b7.intern [10.0.16.21] id ether-00:04:76:d3:28:b7.
For Printer Management point your web browser to https://www:631 and accept the self-signed certificate. This is the normal CUPS management interface where you can add/delete/modify your printers and can clean up the printing queue. By default only root is allowed but this can be changed: Open /etc/cups/cups-files.conf with an editor and add one or more valid group names matching your site policy to the line containing SystemGroup lpadmin. Existing GOsa² groups that might be used are gosa-admins and printer-admins (both with the first user as member), teachers and jradmins (no members after installation).