The "2100 Hot" error is often a symptom of a single-point-of-failure. Autodesk allows distributed license servers. Use three servers (Trio) to ensure if one gets "hot," the others handle the overflow.
Officially, Autodesk support will likely ask you to reinstall the NLM or reformat the server. However, internal tech notes reveal that Status 2100 Hot is often caused by anti-virus software scanning the lmgrd.exe process in real-time. autodesk license status 2100 hot
Sophos and CrowdStrike are notorious for injecting DLLs into the license manager, causing a 5-millisecond delay that triggers the "Hot" status. The "2100 Hot" error is often a symptom
Do not just restart the service. Do this exact sequence: Sophos and CrowdStrike are notorious for injecting DLLs
As a piece of software functionality, Autodesk License Status 2100 is a failure of usability. It is opaque, scary, and disproportionately disruptive for what is usually a minor configuration issue.
However, as a strategic tool for software monetization, it is brilliant. It is the gatekeeper that ensures Autodesk retains total control over the keys to the kingdom. If you encounter it, don't just look for a fix—recognize it as a signal that the era of the "Network License" is officially over.
Technical Fix Summary (For those currently stuck): If you are currently staring at this error, here is the quick fix: