In order to synchronise a Microsoft meeting room calendar availability to Worka two things need to be configured in Worka Team:
Setup Account Integration for Microsoft 365
Map Workplace meeting room to existing meeting room definition
After you have set-up account integration a new calendar source will be available in the floorplans editor when adding or modifying meeting rooms.
This source will allow you to choose additional choices for managing a room availability between 'Microsoft 365' and 'Google' (depending on your integration settings)
For 'Microsoft 365' you will need to enter the email address of the meeting room you want to syncronise availability with. This can be located via the Microsoft Outlook/Web Access Room Finder feature or via the Microsoft Admin Centre under Rooms and Resources.
Related:
Setting up Calendar Integration for Microsoft 365 -
Microsoft Learning Centre - Room and equipment mailboxes - Microsoft 365 admin | Microsoft Learn