x360Sync does support Windows terminal servers, allowing multiple users to log into one machine. For a list of best practices and considerations, please reference the Best Practices for Terminal Servers Knowledgebase article.
While Windows terminal servers are supported, x360Sync only allows one single sync queue; all users will share a unified sync queue. For example, if an end user adds a file and initiates a sync process, other sync processes will need to wait until this first process completes.
We are constantly working to improve our terminal server support and will add more information as the feature evolves.