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If you're experiencing issues with Microsoft Office 365 applications (such as Word, Excel, Outlook, or PowerPoint), your account registration may need to be re-registered on your device. Below are three examples of the error messages you might encounter when this happens.

Why This Happens
Your Office 365 registration might be removed if you haven’t used the installed version of Office on this device for over a year.
Important:
Removing your device's registration is device-specific. This means it won’t affect your other computers, your access to files or documents stored in OneDrive or other Office applications. However, it may limit some Office application functionality on that specific device.
How to Resolve:
To restore full functionality, you’ll need to re-register your account by following the steps below. If you’d prefer assistance, contact the UWIT HelpDesk at userhelp@uwyo.edu or by phone. NOTE: Make sure to close all Office applications before proceeding with the steps below.
- Type the word Settings in Windows search bar on the bottom left of your taskbar, and click on Settings.

- Select Accounts from the options listed on the left-side window.

- Select Access work or school from the list of options.

- Find your account name, and click on the drop-down arrow on the far right and select Disconnect.

- Select Yes for the next pop-up and allow the process to complete. Note: data will not be lost.

- Once your account is disconnected, you should see the following screen. Close the Settings window.

- Next, you'll need to sign into an Office application with your UWYO credentials.
Open an Office application, like Word, Excel, or Outlook, and click Sign In.

- Enter your UWYO username including the @uwyo.edu.

- Next, enter the UWYO login screen will ask you to enter your UWYO username and password. Click Logon.

- Click OK and then click Done.

- Your UWYO account has now been registered with Microsoft and Office 365 on that device.