Foreign Character Encoding in PRoxy to File

Hi Experts ,

We have a scenario from Proxy to File . Recently we have encountered a problem of foreign character 'José Cordeiro' coming from Proxy which is failing in Moni with the error code "  Runtime exception occurred during application mapping com/sap/xi/tf/~; com.sap.aii.utilxi.misc.api.BaseRuntimeException:Character reference "&#1" is an invalid XML character"

Since sender is proxy we do not have option to change the encoding , by default the encoding is UTF-8 .

How can we solve this problem or change encoding to process the foreign character ?