Hi CGB,
You can use the US Treasury quote server. See this for instructions on using this server:
https://www.fundmanagersoftware.com/int ... USTreasuryHow are you verifying the prices are getting updated? If you get an error message when retrieving prices, then they probably aren't getting updated from a price retrieval, and you'll want to change either the symbol or server. Maybe they're getting updated when you retrieve transactions from your broker, if they're held at a broker?
FM won't automatically try a different server than the one you've specified for an investment. After you retrieve prices, if you get an error about a particular investment, you can also double check in the log file (Help / Logs / Price Retrieve...) to see which investments updated, and which didn't, and what servers they retrieved from.