Customize Task URL in Email Notification

Hello,

I'm having a problem with notifications that BPM sends to thid party users (Customers). The BPM sends the notification with the hostname of the CE server,

Example:

http://sminced0:50000/webdynpro/dispatcher/sap.com/tc_bpemwdui~taskinstance/ATaskExecution?taskId=4295cddfbac011dfa2ca0000008913fe

That link cannot be access to the customer for obvious reasons, is a local server name that only works in the company LAN.

I need to change that link for our customers to make it avaiable an accesible for them. I have to change the hostname to an IP Address.

Example:

http://172.18.9.20:50000/webdynpro/dispatcher/sap.com/tc_bpemwdui~taskinstance/ATaskExecution?taskId=4295cddfbac011dfa2ca0000008913fe

Please, any one know how I can achieve this?

Thanks & Regards

SU