The instructions below are for personally-owned Macs only If you have a University-owned Mac and are having problems with Office 365 crashing, contact your local IT support or the ITS Service Center. Log into your local user account and activate again.Select +, and then fill in the new account information, and then select Create User.Select Click the lock to make changes, and type your password.From the Apple menu, select System Preferences > Users & Groups.If you don't have a local user account, you must create one:.If you are signed in with a network account, sign out and sign back in with your local user account.If you've signed in to your Mac using a Network account such as an Open directory account, this error may occur because Office for Mac can't write your credentials into the keychain as it is 'read-only.' Start any Office app again and follow the activation prompts.

Personally-Owned computers: Download and run the License removal tool to remove all the Office keychain entries.Izzy-managed (University) computers: Go to Applications -> Utilities -> Service Provider Support, find the 'Office 365 License Removal Tool' and click the 'Remove' button.If the page loads, your internet connection is working.

You can do this by opening your internet browser and going to.

Make sure the internet is working on the Mac.

The error code is: 0x0' Resolution Activation Error The error code is: 0xD000000C' or 'Unknown Error. An Unknown error has occurred. Attempting to activate or use Office 365 on Mac and a component crashes or you receive the error, 'No credentials / The system requires that you sign on to a valid account.

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