Get rid of the "You Can't Get There From Here" message
When you login from Outside of your VPN network, you should be able to just log in Once, and Never have to see a 'You Can't Get There From Here' message. Formerly, you had to close that window and repeat 2 or 3 times before Teams would finally let you in. Now, I no longer get that option, instead, I'm just in an endless loop of getting that message every time I log in, so I never get to use the product.
David Eberhardt commented
This is a security question, you should field with your AD/AzureAD Team.
As Teams is a file-sharing tool, restiction from non-corporate/non-managed devices does make sense. If you do get the message, it is because your Admin Team decided to not allow it.