Last time I checked it was wrongly reported as malware and blocked at the browser level.
At least it's accessible now but there may be some latency in Defender getting updated.
The tool is sound. Unless your company explicitly disallow it, you should be able to bypass defender and force it to install, although there are some dark patterns there that may not make it obvious.
The author of the tool is aware of the problem, from the github page:
_N.B. A few antivirus programs incorrectly flag Policy Plus as malware. Policy Plus is a powerful tool and so may cause problems if used recklessly, but it is not malicious. If you would prefer to not trust binaries, feel free to read the code and compile Policy Plus from source. You can also verify that a build was created from the published code by examining the output of a GitHub Actions run: the input commit hash can be found under "checkout master" and the output executable hash can be found under "compute hash."_
The tool is sound. Unless your company explicitly disallow it, you should be able to bypass defender and force it to install, although there are some dark patterns there that may not make it obvious.
The author of the tool is aware of the problem, from the github page:
_N.B. A few antivirus programs incorrectly flag Policy Plus as malware. Policy Plus is a powerful tool and so may cause problems if used recklessly, but it is not malicious. If you would prefer to not trust binaries, feel free to read the code and compile Policy Plus from source. You can also verify that a build was created from the published code by examining the output of a GitHub Actions run: the input commit hash can be found under "checkout master" and the output executable hash can be found under "compute hash."_