You have to be aware of both Windows time and ICM time (established by the Call Routers).
From the ICM perspective, as long as you are not going back in time and potentially writing duplicate records in the ICM Db then you are all set.
So, if you are moving forward in time (e.g. ICM time is 12:00:00.000 and NTP time is 12:01:00.000) then:
- stop ICM on all components,
- change your time,
- follow all Windows rules with setting NTP sources and configuring clients and domain members, including rebooting the servers,
- rerun ICM setup from the \ICM\BIN\ directory on the Routers and PGs and confirm the Disable MDS time sync is disabled on those components,
- restart ICM
If you are going back in time, then you’ll have to document your delta and keep the system down for greater than that delta. For example if ICM time is 12:00:00.000 and NTP is 11:45:00.000, you’ll have to keep ICM down for greater than 15 minutes in order not to duplicate records in the Db. Otherwise the process is the same as above.
/Jeff
