[EDITED-2019-03-28] I would agree to Adrian Begovich's point above. It is important to note that every API has its own quirks and caveats. One's experience with a product is only relevant if it is about the same mentioned API - which is Dynamics 365 Online…

Hi Adrian Begovich

Thanks for your reply. I already do the migration with SSIS and the migration of appointments is not a lot of work. My only concern is that the appointments must not sent to the customers again because we have already planned appointments…

Adrian Begovich thanks a lot for sharing. Now I know how to prepare myself to take an exam :)

Thanks for the response Adrian Begovich - it seems that I actually have a sync issue at the moment.  It seems that I'm the only one with it, so may need to call support.

Hi Adrian Begovich,

Thanks for your answer, could you help me to explain more? Where can we upgrade the CRM instance ?