I was having a similar issue as this and found a solution I figured I would share here.
Summary
In my case, the user has access to multiple mailboxes and was caching all of them. Which seemed to cause problems with immediate updates while the user was using Outlook.
What I did
- I went into my user's account settings to
Change
- Opened up
More Settings
- Then went to the
Advanced
tab and unchecked Download shared folder
under the Cached Exchange Mode Settings
This fixed my problem, although I am not sure if this fix is applicable to everyone.
Bear in mind
Cached Exchange Mode
stores a local cache of your outlook files and folders on your local machine in an .ost
file. This allows for users to use and manipulate their emails even when offline.
Turning this feature off, while it may fix the problem, will prevent users from viewing or using their email while offline. While the Download shared folders
options will only do it for the extra mailboxes the user is given permission to in Exchange.
Extra: Shortening the amount of time it caches could also help.