The domain vstmr-visualstudio-com.bx-0007.bx-msedge.net appears to be part of Microsoft's infrastructure, hosted on their own IPs and network. That might sound reassuring, but our analysis found critical flaws that make it untrustworthy. The SSL certificate is invalid, and the site is currently unreachable due to a TLS error. That means any data you send to this endpoint could be exposed or intercepted. Even if this was once a legitimate Azure endpoint, the current state is broken and unsafe.
For a technical service like this, security is the most important factor. Legitimate Microsoft endpoints nearly always have valid certificates and proper DNS configuration. Here, the certificate is valid for a different domain (azureedge.net), which is a red flag for misconfiguration or impersonation. There's no contact information or about page, but that's normal for a backend URL. The lack of any history in the Wayback Machine suggests this subdomain is very new or ephemeral.
If you came across this domain in a setup guide or script, treat it with extreme caution. It's not delivering any service right now, and its security is compromised. I recommend using official Microsoft channels instead. For now, the answer to "is vstmr-visualstudio-com.bx-0007.bx-msedge.net safe" is no, and it's best to avoid it.