Device logon user showing mismatch in Microsoft Defender for Cloud (Server)

Hello Team,

We have onboarded Exchange server in Microsoft Defender for Cloud (Server). And this server successfully showing in Microsoft Defender for Endpoint Assets lists. When we view a single asset details, we found that in logon user details there have 417 users in user lists. They all are not directly login in this Server. Then why it is showing total 417 users in user lists?

Thanks

Noyon