Hi! How did you access your desktop from your laptop? Did you use Remote Desktop (RDP)? Did you click an icon and immediately connect to your desktop? Or are you talking about an email account?
If you connected by double-clicking an icon, or through the Remote Desktop Connection function, you should delete the icon you used to access it, and then press Windows + R > Type control keymgr.dll > Windows Credentials > Look for credentials that contain company data, such as IP, username, password, email...
The IT team probably blocked your access. But it's recommended that you check with your company's IT team, as each company may have different connection methods and policies.