Sometimes the issue isn't network, but corrupted local save sync or Xbox Live token.
The Reset Procedure:
To apply the correct Forza Horizon 3 online fix, identify your error: forza horizon 3 online fix
The honest answer is yes, slowly. With the game delisted and no new patches incoming, eventually Microsoft will shut down the FH3 matchmaking servers entirely (likely in 2027-2028, following the Forza Horizon 1 & 2 timeline). Sometimes the issue isn't network, but corrupted local
However, as of 2026, the game is still playable online. The majority of "disconnected" errors are local Windows configuration issues, not dead servers. By following Method 1 (Xbox Networking) and Method 2 (Manual Teredo), 9 out of 10 players can fix their connection. The honest answer is yes, slowly