With the release of ITMS 8.5 RU2 there were some new Web Service methods added to the following:
Collection Management Service
- GetExclusionGuids
- GetInclusionGuids
- IsExclusion / IsExclusionX
- IsInclusion / IsInclusionX
Patch Management Service
- CreatePatchInstallationTask
- EditPatchInstallationTask
- SetGuidCollectionProperty
- SetPluginPolicyMicrosoftUpdateOptions
You may want to update the Zero Day Patch 
Workflow to leverage these new methods:
Workflow Template - Zero Day Patch
https://www.symantec.com/connect/videos/workflow-template-zero-day-patch
Resource Management Service
- SetAssetOwner / SetAssetOwnerX
- SetAssetState / SetAssetStateX
Resource Model**(NSWebService)**
- GetDataClassRows / GetDataClassRows2
- SaveDataClassRows
To keep track of updates you can compare Web Service Methods using a tool I've written
Documentation
Symantec™ IT Management Suite 8.5 RU2 Release Notes
https://support.symantec.com/en_US/article.DOC11423.html
DOC11423