This should only be used to update a one-to-one relationship between dRofus Occurrences and instances in Revit. This means that it is not recommended to sync planned Items in Rooms, but is best suited for syncing Systems or Items as Doors

Before instance and occurrences can be synchronized you need to:

Sync Selected Instance

Step 1: Select Instance

Step 2: Open “Sync Selected Instance” window

In the drop-down-menu located in the “Systems/ Ocurrences” section within the ribbon select either:

a) “Sync Selected Instances (no prompt)” to start synchronizing.

b) “Sync Selected Instance” to see the synchronization options before starting to synchronize:

Window bellow will appear:

Step 3: Select Options in the”Sync selected” window

Select “Move Occurrences to this model” if you would like to update the model name. Read more https://drofus.atlassian.net/wiki/spaces/DV/pages/2430412768
Select “Use system types” if you would like to sync your system on System Type level and not “System Name”
Verify that the right configuration are in use
Select “Categories” of Family Types that should be included in the sync.
Select “Ok”

Prior to the completion of the synchronization process, a preview of the occurrences that will be created and updated (refer below) will be provided to you. This preview will enable you to assess the extent of the operation before finalizing it.

6. Select “Continue” to synchronize selected instance

The synchronize is completed

dRofus Wiki

Sync Selected Instances.

Sync Selected Instance