Removing the iCloud data file from your profile (open it using Control Panel, Mail) and stopping sync in the iCloud applet may allow Outlook to work for you.

A registry key is now available that will allow iCloud (and other affected MAPI services) to work with the patch installed.

Outlook 2007 is the only version where iCloud is affected by the June 13 2017 security update, but attachments are blocked in some scenarios in Outlook 2010, 2013, 2016.

Yes, Office 365 will work with iCloud (in the same way iCloud works with other accounts).

However, we do not recommend using Office 365 Exchange or Outlook.com mailboxes with iCloud.

These accounts support syncing your calendar and contacts between the server, the phone, and Outlook on your desktop, so you can get your calendar, contacts, and email on your iPhone or iPad over-the-air and on any device you access Office 365 from.

You do not need iCloud to share Office 365 data between computers and should not enable it.

When iCloud is enabled, it moves calendar and contacts to the iCloud folders, removing them from the Office 365 server.

These accounts support syncing to the device and all data is already in the cloud and syncs to all devices and computers.

Although you will see iCloud listed as a data file option in Outlook, you need to use the iCloud service to add the data file and configure the service.

You cannot add a iCloud data file using Outlooks Account Settings, Data files, Add.

If you are using an Apple email address (mac.com, me.com), select Mail also.

To set up the email account manually, see Configuring Me accounts, below.).

This is a separate calendar and when it works correctly, your default calendar in Outlook will sync to iCloud.

At this point Im not even sure its worth backing them up, since everything is in the cloud).

The data file used by iCloud 1.x (from iOS5) cannot be set as the default data file.

The data file created by iCloud 2 (iOS6) can be set as the default data file if you use a POP3 account.

When iCloud is set as default and you use an IMAP account, you cant send email.

Only the iCloud service can add the iCloud data file to the profile.

The symptoms vary, from new Contacts and Calendar created in Outlook syncing up to the iCloud but changes made on the iPhone or iPad not syncing down to Outlook to all of the Outlook Contacts disappearing from Outlooks iCloud Contacts folder and new calendar items not showing in Outlook.

If the first one doesnt fix it, move on to the next one.

Repair is rarely needed.) In each case, you need to close Outlook first.

Deselect Calendar and Contact sync in the iCloud control panel, Apply, then re-enable it.

Sign out of the iCloud in the iCloud control panel, then sign back in.

Repair the Outlook installation in Control panel, Programs and Features.

After rebooting the computer, everything should show up in Outlook again.

If you are going to re-enable the iCloud, it doesnt matter as everything will sync back when you re-enable iCloud.

If you are removing the iCloud from your computer, you should keep a copy.

Icloud In Outlook For Mac