CAA50024 Error when Opening Office 365 Apps

Symptoms

Users may encounter CAA50024 error when opening Office 365 apps including Outlook, OneNote, Teams etc.. This error is due to conflicts of cached credentials, and will most likely occur on Windows 10.

Resolution

You can fix this issue by removing all previously saved credentials. To remove stored credentials and force Outlook to use your Windows desktop credentials, follow these steps.

Click Start and search for Credential Manager. 

Locate the set of credentials that have Outlook, Office, Teams or OneDrive in the name.

Click the name to expand the set of credentials, and then click Remove from Vault.

Repeat step 3 for any additional sets of credentials that have the word Outlook, Office, Teams and OneDrive in the name.