I used to open Outlook, and it would go and bring in all my Gmail mail. Now, I get an error message that syncing has failed. The error message says to contact my ISP. Is it their doing, or is there something I can do at my end?
A bit more information on your set up would be helpful; however, it is safe to say that the problem is entirely on your end. I have 7 gmail accounts working just fine with Outlook. I would just restart the computer and go from there.