Outlook error "Something unexpected went wrong with this url"

Hi all,

I know this is a very late reply, but I wanted to make sure you saw that we posted a Known Issue article, Outlook blocks opening FQDN and IP address hyperlinks after installing protections for Microsoft Outlook Security Feature Bypass Vulnerability released July 11, 2023 - Microsoft Support.

The Security Update CVE articles (in the link above) are also updated with a FAQ item explaining the changes further and that these are expected. These changes should have been communicated with the security updates. I apologize for the disruption.

This issue is also being published in the M365 Service Health Dashboard as EX649739.

Having same issue started this morning. Not sure if it's regarding a recent update for Windows or 365 that might have caused the problem.

Tried a few options but WebDav hyperlinks that are created in an email are not accessible by the person receiving the email.

Currently our sharepoint drives are setup using a WebDav sctipt that maps them as network drives.

This change is a permanant change due to a security update. The mitigation is to add the affected URLs to Internet Options, Trusted Sites, per guidance here, Outlook blocks opening FQDN and IP address hyperlinks after installing protections for Microsoft Outlook Security Feature Bypass Vulnerability released July 11, 2023 - Microsoft Support.

So Microsoft's solution to security issues is to block links to every file on a mapped drive? And why FQDN but not UNC? This is just **** programming, and I expect better from Microsoft.

That is a work around for now. Microsoft introduced the problem in recent updates and it should be fixed.

If you are getting this error:

then add this file://\abc.local to the Trusted Sites inside Internet Properties ("abc" needs to be changed to yourdomainname.local)

Or when the people are creating the links they need to type the server name:

So instead of typing \abc.local\work\Finance you need to type \abc-fileserver-1\work\finance