Unable to activate Microsoft 365 for Mac after installation

To complete the steps below, you'll need the email address and password associated with your active and licensed Microsoft 365 subscription. This may be your Microsoft Account or the account you received from your organization.

Step-by-step guide

  1. Check to make sure your internet is working on the Mac you're trying to install on. You can do this by opening your internet browser and going to www.microsoft.com. If the page loads, your internet connection is working

  2. Reset your license files

  3. Open Spotlight by selecting the magnifying glass at the top right of your desktop

  4. Search for and open Keychain

  5. Type in Office and then delete the data license file

  6. Download and run this script

  7. Try from Safe Mode

  8. Uninstall Office for Mac, and then try reinstalling and activating again


Need help?

Contact the IST Service Desk online or 519-888-4567 ext. 44357.

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