Hello Neelima,
Thank you for your request.
The problem here is that the synchronizers are only triggered when there is some change done to an issue - like updating fields, links, etc. Adding issues to a structure or moving them in a structure does not trigger synchronizers.
The functionality for building a structure out of several smaller ones will be added in Structure 3.0, which are working on right now, but since it will take us some time to finish and release this version, there are a few workarounds you can try for now.
If your team structures are populated by filter synchronizers, you can just setup a filter synchronizer for the Combined structure and use the filter, which contains issues from all three team structures.
If this is not the case, you have an option to manually run the re-sync for the Filter synchronizer for the Combined structure, or use a plugin to run this synchronizer on schedule. We’ve developed this plugin to demonstrate how to use Structure API, but eventually there are a few customers, who are using it in the their setup:
I hope this works for. Please don’t hesitate to contact us if you have any more questions or need assistance.
Kind Regards,
Eugene Sokhransky
ALM Works