The vendor has published 2 unique mention(s) for this bug: 1. If the clocks on Citrix Provisioning Servers in a farm are not synchronized exactly, the Citrix Provisioning Server where the clock is set to an earlier time than the server which checks license activation with the License Server would incorrectly declare that Citrix Provisioning Server is not licensed. The fix allows the clocks to drift up to 15 minutes when checking the cached data. Also, you must synchronize the servers to the same time source to avoid future problems with clock drift. 2. If minor clock differences exist between PVS servers, license entitlement checks might fail and target devices might display the message: "A device license has been reacquired and the pending shutdown canceled." At desktop sign-in; server clocks can now differ by up to 15 minutes without triggering the error. Latest urls for this bug: 1. https://docs.citrix.com/us/en/provisioning/current-release/whats-new/fixed-issues.html