I have a client that runs Magento for their order processing. Originally it was a full E commerce site but now they only use the admin section - no front end.
The Magento version is 22.214.171.124. It has a fooman extension for Xero Intergation. which we have had to upgrade because Xero has ceased to support Auth1. The upgraded fooman extension wont work because the version of php the system runs on is 5.4 and the Xero Auth 2 requires 5.6 or above.
The system also runs Xtento (simplify bulk order processing) version 1.7.5 and the latest version is 1.9.2 Not sure if we need/want to upgrade to this.
There is also custom module in place that provides some integration with the ERP extension and Xero. This code has also been written for Xero's API v1 and would need be to be updated to work with Xero's v2 API.
Question - we are looking for a provider to support the system now to upgrade the php and get the Xero integration working and then to provide support with upgrades etc into the future.