If your email address is hosted through Office365 or Outlook.com, you may occasionally encounter an error when sending a tracked email through Bananatag like so:
What does this mean?
As an additional security measure, Microsoft invalidates the unique token we obtain from them in order to access certain portions of your email account every 90 days, which requires users to "re-authorize" their accounts for use with Bananatag.
How do I fix this?
This error is extremely easy to resolve! All you will need to do to re-authorize your account is open your Bananatag sidebar from the addin by clicking Track and Send in a compose window (or by clicking the little yellow Bananatag icon if you're using Outlook Web Access). Then click the Gear icon, and click Sign Out at the bottom. After you sign back into Bananatag, your token will be refreshed and valid for another 90 days.
After this point, you should be able to continue tracking your emails as Bananatag will possess a new validation token for your Office365 or Outlook.com account.