Hi Ahmed,
On TMS you can use the following steps:
Stop all TMS services together with IIS services.
Change the IP address of TMS server (Windows Server).
Make sure you have proper DNS server entries for new IP address.
Start all TMS services together with IIS.
Update new IP address in TMS web under Administrative Tools > Configuration >Network Settings.
Once these settings have been changed, click on enforce now to get this new IP address enforced on all systems.
On TMSXE the TMS related info is present under the Configuration Tool.
HTH
Manish