Does it need agents, a database or an internet connection?
No agents, no database and no internet. The service keeps settings, keys and the audit log in a folder under ProgramData. Microsoft Graph is contacted only if you connect an Entra ID tenant, and licence keys verify offline against the vendor's public key.
Where does it run?
On Windows Server 2019 or later, as a Windows service installed by the MSI. A domain controller or a member server both work, including Server Core. Two cores and 2 GB of RAM are plenty.
Whose permissions apply when I make a change?
Yours. Sign in with your Active Directory account and every write is made with that account's rights, so delegation you already have in AD carries straight over. A service account can be configured for hosts that need one.
What happens when all seats are in use?
The next directory sign-in is refused with a message to contact TideReach Ltd for more seats. Nobody is signed out to make room. An administrator can disconnect a session from the Sessions page.
How do upgrades work?
Run the newer MSI over the existing installation. Settings, encryption keys, licence, audit logs and sessions are kept. The version is shown in the title bar and under Help, About.
How do I buy, and can I move the licence to another server?
Open the Licence page in the console and copy the Installation ID and Domain SID. Send them with the edition, number of domains and number of seats you want, and you receive a key that works on that installation only. If you rebuild or replace the server, send the new Installation ID and a replacement key is issued for the remainder of the term.
Can I edit the settings inside a GPO?
Not yet. Linking, ordering, enforcing, inheritance and creating or deleting GPOs are all there. The policy settings editor is the next major feature and Pro customers get early access.