我认为答案在于域名。

www .yammer.com和 api .yammer.com被视为两个不同的网域！

www.yammer.com and api.yammer.com are treated as two different domains!

t尝试了，但我认为这是一个非常安全的猜测， api .yammer.com也将为您的前两个请求工作。

I haven't tried it but I think it is a pretty safe guess that api.yammer.com will work for your first two requests too.