Outlook error "Something unexpected went wrong with this url"

I found the same issue but i can fix it now.

Please try solution as below.

> go to Control Panel >> Internet Option >> add URL, UNC, FQDN path that you want to allow

> Adjust the scale down and select Enable Protected mode

Hope will help to fix your problem

Seeing the same error, this appears to be across several different versions of Microsoft 365, so I'm suspecting something in the most recent patch Tuesday updates for Windows 10, all reports of the issue started yesterday after users starting rebooting following the patch Tuesday windows updates.

We are seeing this on Builds:

• 16501.20196 - 2305
• 16529.20154 - 2306

For file URL's which has me specifically suspecting Windows and not a particular office build or update, since these are older stable builds.

I have further traced the issue with users on our side and found that file links with an FDQN (raise the
error)

Those with just a host name raise a security warning first then work.

NOT working (FQDN within link)

\filestore.domain.ca\docs\docsample.pdf

file://filestore.domain.ca/docs/docsample.pdf

Working (Host name only within link)

\filestore\docs\docsample.pdf

file://filestore/docs/docsample.pdf

Also for working links with the Host name only not FQDN the following dialog is raised on a trusted domain that was not raised previously when clicked.

Seeing it here as well. It's not web URLs that are the issue, it's file path URLs.

Grrr... same issue here.

file:///\servername.domain.local\filepath => doesn't work

file:///\servername\filepath => works

It seems that FQDN is now broken in Outlook / File Explorer :(

looks like its users that are on version 2305

we get the notification below :

if you try the new version of outlook, you get a security pop up

we have a cpl of users not updated and they are ok

and i don't think there is a way to roll back the office install version