We are currently running in hybrid mode, half of our users are online and the other half are on-premise. All of our users are in Cached mode. This was working well until we started migrating people with delegate permissions to other calendars.
Example: We have an administrative assistant that has delegate rights to the owner of the company. Her mailbox is online. She also views other calendars of people that are on-premise. The on-premise calendars do not update and she has to go into online mode to see the latest calendar info for the on-premise people. When she goes back into cached mode, it goes back to the old calendars. I understand at this point the ost/calendar is not updating or corrupt. She has download shared folders enabled. We will be in hybrid mode for some time until we can get everyone moved up. What is the solution to this?