I would rebuild the DirSync server and reinstall clean; there is no need to deactivate and reactivate DirSync.
There should be no impact to AD FS and since your sync is already failing, no further outage than what you have now.
I would rebuild the DirSync server and reinstall clean; there is no need to deactivate and reactivate DirSync.
There should be no impact to AD FS and since your sync is already failing, no further outage than what you have now.