I upgraded to PHP 7.1 with Software Asset Manager 4.3.4. The data sync is now failing.
The ImportDriver.log file has error:
Error in deserializing body of reply message for operation 'monitor_data_exchange_process'.

Release:
Component: CASAM

Do the following. 

Go to “C:\Program Files (x86)\CA\SAM\app\includes\prod\st\custom\ca\custom_config.inc”. Backup the file prior to making changes.

This file has a method as follows: 

public static function get_soap_namespace() 
{ 
return 'http://ca.com/wsdl/'; 
} 

Comment the section out or remove these lines after taking a back up of the file. Restart the IIS on SAM server and the Event Service on ITAM server. 
Check event service logs after 5 mins and see if you are still getting the error. 
Also restart the import driver and see if the error is still reproduced.