The software landscape has changed significantly since version 2.5.1 was released (circa 2015-2017).
Microsoft’s EULA explicitly forbids the reverse engineering, decompiling, or bypassing of technological measures designed to protect the software. Use of this tool puts the organization in breach of contract. microsoft toolkit 2.5 1 windows and office activator
The use of Microsoft Toolkit 2.5.1 presents severe security vulnerabilities: The use of Microsoft Toolkit 2