Hi all, 

I'm quite excited about the new Calendar Sharing feature coming with Winter'18 Release. However, I can't see any limitation on the release note. 

Here is my use case : 

An external Telemarketing agency user access Salesforce through a dedicated user and assigns Sales reps (around 300 users) Tasks and Events (visits).

Sales reps work on Lightning by Telemarketers are on Classic interface in order to access their calendars.

Would it be possible for the Telemarketing User to access the 300 Sales reps' Calendars if they share it to him ? 

Thanks