How to manage tasks within external user acces?

[Girts Mazais]

We are a small company and just started to use Jira - Jira software (JS).

As a next step, we are looking - how to grant access to our customer's view/comment/follow up issue statuses. 

As much we found out there are some suggested solutions:

1. Grant customer user access to JS.
   This option we exclude as it is very expensive because each customer can have many representatives.
2. Use Jira Service Desk (JSD)
   This would be an option. Customers can submit requests trough Customer portal and follow up statuses. But - those tasks, submitted through the customer portal, go to a different project (to JSD project, not a JS). Question is how to integrate JSD tasks with JS tasks? What is the best praxis or solution to integrate then?
3. Addon "External share for JIRA on Cloud". Also a great option, but, it does now have one place to follow up all tasks. 

[Gökçe Gürsel {Appfire}]

Hi Girts,

You can link your Jira Software issues to your JSD tickets. Your agents can notify your customers about the progress and change statuses or you can use scripts to connect workflows so that the JSD project and its Software counterpart will progress in sync. 

Let me know if you have further questions.

Regards,

Gökçe

[Girts Mazais]

We come on such idea - with the help of Automation rules - would be possible to update statuses between JS and JSD. 
Wanted to ask in the forum, before we start a setup.