I guess it depends on the functionality you need and the outputs. If you mean could it be used as a forum for users and guests to have their questions answered? Yes it could and I know several businesses today doing this. Will Teams operate like a mature support application like Zendesk? Then the answer is no not at the current time. It doesn't currently allow things like case/ticket management for example. It can't report on SLA's, it wouldn't be able to give users an update on the status of their enquiry or issue.
However, you can integrate apps like ZenDesk with Microsoft Teams - and I know that the Microsoft team is considering doing something like this in the future.
So all in all, I would say at the current time I would use an app such as Zendesk and plug it into Teams as to trying to make Teams do something it hasn't got the features for to provide a high quality support/helpdesk experience for both users and the customers.
I think it depends on your demands for the "servicemodule". The combination of Teams and Planner boards can be a powerful thing but for most cases, the abilities are too limited as already mentioned above.
In any case, Teams/Planner is a great thing to support your Service team especially when your Service module is integrated into the team.
Only way teams can make a viable support system is utilizing the underneath SharePoint site and building out some lists to handle ticket tracking and using the new list modules for searching and send to access the different lists. But Teams itself. No way I would ever use it for support outside of a communication tool for direct questions and responses. If that’s the only requirement then fine a guess only if volume is extremely low.
@Himanshu Singh - I agree with others that teams would not be a robust support system by itself. But, I’d recommend including Teams as a part of your helpdesk's tools. Our helpdesk’s Team is the heaviest used Team at our university
Yeah! As said here, not by itself but used either as a compliment or to integrate it! There’s lots of possibilities and further ones ahead regarding integration with other apps, create actions directly from chat etc..the service module in Dynamics can be integrated into Teams already for example