You may need to download Internet Explorer 11 (Offline installer) and push this installer to your 150 offline PCs, then run installer to install IE 11.
https://support.microsoft.com/en-us/windows/download-internet-explorer-11-offline-installer-99d492a1-3a62-077b-c476-cf028aff9a7f
If your 150 offline PCs even cannot connect to intranet, you need to copy IE 11 offline installer into a USB drive and manually install it on offline PC one by one.
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