Synching Outlook w/iCloud sent invites to everyone

Question

When setting up iCloud, I synched Outlook (local). It worked just fine.
Until... I heard from across the office, "Hey, why are you filling up my inbox?"
Turns out, it started re-inviting everyone (hundreds of emails) to events. Events I didn't even originate. Events that will happen in the future. Events that happened in the past.
I've spent the weekend emailing everyone trying to profusely apologize, sorting through each meeting (I have a lot of them, involving a lot of employees and clients).
Apple, ***? I can't even figure out what setting would've possibly caused this, and I don't even want to touch iCloud for fear of the same **** thing happening again. Which means, my new iPhone is basically useless with Outlook.
Can this be? If I simply sync it outside of iCloud, will this happen again?
No trust, no faith right now. Angry people/clients. No troubleshooting available that I can find.
Help?

Answer 1

I found a way to stop the inviations from being sent to everyone. 
Outlook 2010
-         Double click on the calendar entry that has the invitation
-         File (on top at far left)
-         Move to Folder – select delete
-         You will be prompted to enter an email address – enter yours
The invitation will now be deleted and the copy only sent toyou. This is a pain and for me I had to do one by one since my reoccurring events did not transfer at reoccurring. 
I beleive this will work in older version of outlook -
Open your Outlook calendar and select the meeting item.
Delete or cancel the meeting anyway you like.
The meeting dialog will open and ask you if you want to send the notification.  The attendees’ names are conveniently already entered in the To: field.
Delete all the attendees’ email addresses and enter your own (or any other) email address.
Mouse-click the Send Cancellation button.
My final solution: 
Calendar:  sync mycalendar with categories on MSN.  I canalso use this on idevice and exchange
Email:  leaving on icloud since I was on a mobile and that account is all organized.  But, I still use my MSN address and forward my emails to icloud.  Why?  I was an early adapter to mobileme and it was very unstable.  Over time I have grown to appreciate always having a clean email account where the originals are kept. 
Contacts:  At the moment they are on icloud but I am testing MSN.
Google is not a solution for me since I use more than one calendar and prefer to use categories.   You also need to use an intermediary sync program and it was slow……….  Plus I prefer the organization of outlook to Google. 
Issues with icloud calendar that worked in mobileme:
1.  Lost reoccurng events - they appear but not as reoccuring
2.  Lost categories
3.  There are actually fewer options in icloud! 
4.  Forced integration immediatly on all devices.  This is huge - we should be allowed to test and use.  Instead we could not access email, calendar or contacts until devices were updated.
For me this was a backwards step....