Quicklaunch requires the ability to connect to a Room Resource.
Note that this Room Resource will not require a license unless you are leveraging a Skype for Business Account. It can be licensed if you are wanting to use the o365/Teams but this is NOT necessary for presenting the room calendar on the Quicklaunch application.
How to create Room Resource:
Microsoft Provide direction on how to create a room resource in their documentation:
O365: Create and manage room mailboxes
On-Premise: Create and manage room mailboxes in Exchange 2013
EWS - Enable Password
If you are using EWS you will need to enable the Password for the Room Resource.
O365: Reset a user's password using Azure Active Directory
NOTE: On O365 after you have set the password in Azure AD you will need to log onto the account via office.com and reset the password.