We are often asked how to merge two folders. This can mean one of two things: keep the calendars separate but view them as one using calendar overlay or combine them into one folder.
If you use Outlook 2007 or Outlook 2010 and a day, week, or month view, you can overlay two or more calendars by right-clicking on the calendar folder and choosing Overlay. You can also click the small arrow in the calendar name tab to overlay or separate.
Merge into one calendar
If you really want to merge the calendars, it's easy – use a list view then drag the items to the other folder. Or use the Move to folder command. It doesn’t matter which type of Outlook folder you are using, the method is the same for all folders.
- Begin by selecting the folder you want to stop using. If its a calendar folder, switch to a list view, such as All Appointments or By Category. In Outlook 2010, it's called List view. In Contacts, use Phone list view.
- Click on one item, the press Ctrl+A to select all.
- Use the Move to folder (or Copy to folder) command or drag the items to the folder you want to move the items to.
In Outlook 2007 (and older versions) use All Appointments or By Category. In contacts, use Phone list or By Category. 
In Outlook 2010, choose List view from the view menu. 
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Last reviewed on Feb 11, 2012
Hi,
I wish to thanks the one who sent me the instruction, it did work…………….Again thanks..Andre
Thanks for the advice. I’ve been having a nightmare with my calendar entries since upgrading to ios5 on my iPad as whenever I’m invited to a meeting it ends up in my default Outlook calendar not my iCloud calendar so isn’t on my iPad. Now I can just move all the items in my default Outlook calendar across very quickly on a regular basis. I’ll be glad when this issue is resolved, but the steps you describe above provide a great workaround in the meantime.
Help! I tried merging Outlook with iCloud. I have since shut off iCloud. My appointments from 5/25/11 thru the future are gone. How do I get them back?
Are they still in the cloud? (They should be, unless you deleted them.) Re-enable the cloud in the control panel and restart outlook then drag the items from the icloud to Outlook. When you are finished, disable the icloud again.