When I add a meeting to my calendar, it's stays less than one minute and disappears. When I put my boss as attendee, the meeting stays on his calendar, but disappears from mine. We're using Microsoft CRM, if that helps.
Actually, yes it does help to know you are using CRM. Meetings can disappear when you use the same email address for an Internal user and a CRM record, such as for an Account, Lead, or Contact. Remove the duplicate address to fix.
A more complete explanation for this is at Outlook Appointments Disappearing
If you aren't using CRM:
- Do you sync with a portable device?
- Have Outlook open on two computers and use Outlook 2010 or older?
- If you switch to a List view can you see the missing meetings?
- Are the missing meetings in the Deleted Items folder?
Either of the first two could mean the event is getting moved to a different calendar. This will happen if you open your mailbox on a second computer and set the delivery location to a PST file (not possible in Outlook 2013/2016). In this case though, your email will disappear from the server too.
If you can see the missing meetings in list view, it means the Day / Week / Month view is corrupt. Try resetting the view where it disappears but you may need to restart Outlook using /cleanviews switch to fix.
To switch to a list view in Outlook 2010, switch to the View ribbon, expand the Change View button, choose List. In Outlook 2007, choose the By Category view. Reset the view using the Reset button on View ribbon or by right clicking on the row of field names and choosing Reset.
What if the meetings are only disappearing for a specific group of people? Not every meeting request disappears!
Are they in the deleted items folder?
I'd look at the smartphone as the culprit if only some disappear. If it's fairly easy to repro, turn off the smartphone and test. If it's random and difficult to repro, its definitely harder to track down (including for the Outlook engineers) but short of the user deleting them, it's likely caused by something outside of the server.
Your info about 'corrupted view' helped.... thanks a million....
Thanks so much - your comments about how to fix a corrupted view fixed the problem... couldn't find this info anywhere!!!
It could also be that if you're using an exchange server the Outlook client calendar archive settings are removing them from the "main" (Exchange Server) view.
Go to the Calendar view and in the left-pane check-mark the Calendar in Archived Folders box to display archived events (Outlook 2007).
Note that old calendar events like country Holidays, lunar events, etc are still viewed in the main calendar, just as any day still exists (like November 2nd, in all prior years). Recurring daily personal appointments also seem to be displayed for prior years.
The archive settings for the calendar can be set to archive further back (I.E. keep 12 months instead of 2) but that will increase the amount of space required on the Exchange Server - but it does make them available for mobile devices and other Exchange users.