Time limited licences
EDS licences may be rented or leased and as such must be date sensitive.
If you have an EDS licence that is time constrained then it will expire when the rental period concludes.
ALL EDS licences are sensitive to "clock winding". If the EDS licensing system detects a clock being wound back then it is likely to "void" itself.
It is possible to wind your clock back with EDS installed, however do not run EDS programs until the clock is returned to its normal state.
Small clock corrections are not considered "winding".