What does a service desk actually accumulate?
More than tickets. A mature deployment holds the asset inventory, a configuration database describing how systems depend on each other, records of who has access to which application, staff records flowing through onboarding and offboarding, and frequently the security incidents themselves.
Taken together that is a map of the organisation — what it runs, where it is weak, and who can reach what. It is precisely what an attacker would want, and precisely what a regulator will ask about after a breach.
That combination is why this category concentrates in public sector, healthcare and education, where the answer to "who processes this" has to be defensible rather than convenient.
Is EU hosting enough?
Not by itself. Where the servers sit matters less than which entity you contract with and which law governs it: a US-established vendor with European datacentres remains subject to US legislation including the CLOUD Act.
The stronger positions are a European contracting entity, and better still a self-hosted deployment where the vendor is not a processor of live data at all. TOPdesk and Matrix42 both offer that route.
Then there is the configuration. Retention periods, access controls, what gets logged and for how long are decisions you make, and a European platform configured carelessly is not compliant because the vendor is European.
What does NIS2 change for the service desk?
For in-scope organisations, incident handling and reporting move from good practice to obligation, with defined timelines. The service desk is usually where an incident is first recorded and where the timeline starts.
That makes the desk part of the compliance evidence rather than an operational convenience — its records have to be complete enough and retained long enough to support a report, and available quickly enough to make a deadline.
Supply chain obligations also bring the vendor itself into scope of the assessment. This is a summary rather than legal advice; take proper counsel for your sector.