Hi Albert,
Yes, Schedule AD synchronization is available for Dashboard Server as well and the corresponding settings to set schedule AD synchronization is available in User Management Server instead of Dashboard Server application. Since, our latest version of Dashboard Server application is available with the User Management Server application which is used to manage Users and Groups.
Please refer the below link for more information regarding User Management Server,
Please refer the below link for more information on Active directory synchronization schedule in User Management Server,
We are planning to release the Report Server with UMS in our next release. At that time, the Report Server users also migrated into UMS to manage the users and group from the single directory.
Thanks,
Sabapathy K.