TestLink

When particular testsuit is exported into xml file format, test case id in missing. The resultant xml file has testcase title, summary, steps , expected results.

What are file i need to change to get the testcase ids in the exported xml file.

in the examples present on 1.8 on docs\file_examples\
file:
enterprise_all_testsuites3.xml
you will find:

<testcase internalid="4" name="10 G shock">

internalid is what you are looking for