Calendar not updating in Outlook 2010 but updating on OWA (Ex 2010 with Outlook 2010)

Question

Hi, 
A few users are having this problem including me. There is a room Calendar which was working fine but not anymore. Here what is happening:
User A cannot see the updates in Calendar, if someone has meeting user A cannot see it. User A can only see by visiting OWA
User A create meeting in Room A via OUtlook. User A can see this but not other users. When visit OWA, User A cannot see that meeting. 
User A creates meeting in Room A via owa. Everyone can see it. 
User A sets outlook in ONLINE mode and now he can see all the updates
So something is going wrong with outlook cache mode that it is not updating calendar or not connecting with calendar. Tried different fixes from internet but not working. Tried to rebuild outlook profile but that works once, but if there is update the same
problem happens again. 
Hasan

Answer 1

Hi Hasan,
Since the issue only happens in Outlook cached mode, please check whether “Download Shared folders” is checked in Outlook settings:
1. Click Account Settings on the File tab.
2. In the Account Settings dialog box, click the
Email tab, click to select the Exchange account, and then click
Change.
3. Click More Settings. On the Advanced tab, check the
Use Cached Exchange Mode and Download Shared Folders check box to have a try, and then click
OK.
4. Finish it and restart Outlook.
Then check whether the calendar can be updated in Outlook.
Regards,
Winnie Liang
TechNet Community Support
It fixed Automatically Winnie. Can't reproduce. 
Hasan