Can not get the newest resource name

[xiJuanZhongYuan]

I have changed the resource name by powershell.
Now the newest resource name is this

but when I use ews java api to call microsoft api, I still get the old resource name
this is microsoft xml

The Subject is still the old value, but I use powershell this command Get-Mailbox -Identity onlyanhuaroom1@zipow.com， I can see the newest resource name.
Is this ews java api's bug?