When adding a company sharepoint site, do I need my IT to provide Admin rights just once?

I am trialling MindManager 22.1.234. My team and I want to collaborate on the same files real-time and we use a Sharepoint site for our working documents. When I try to add a Sharepoint place in MindManager, it asks for Admin credentials.

My IT service desk tells me my windows profile needs to have Admin rights enabled (permanently or for the duration using MindManager) however I imagined they just need them to sign in ONCE as part of the 'Add a new Place' step. And then repeat for each member of my team.

Am I correct that Admin credentials are needed as a one-off exercise or is my IT dept correct?