Hi Hamza,
Greetings from Syncfusion support.
We have validated your requirement at our end and we regret to let you know, there is no inbuilt functionality to synchronize the personal calendar for each resource at a time. Currently, our scheduler makes a single post for every update. You can update the resource personal calendar based on this post data at your end. We suggest you synchronize the schedule events data changes to your required user’s calendars to your own when changes happened with our schedule.
Please let us know if you need any further assistance.
Regards,
Ravikumar Venkatesan