Email Classic - US System - Issues with authorization while logging into O365 add-in

We have identified a potential root cause for the login issues affecting the O365 add-in. Our teams are currently testing a fix and continue to monitor the situation.

Initial findings suggest that a change on Microsoft’s side may be affecting how authentication works for some users. We are actively working to understand this behavior and are also in contact with Microsoft to clarify why the issue appears inconsistently and how we can best resolve it.

In the meantime, we recommend that affected users clear their browser cache and cookies, and perform a hard restart of their browser. This can already mitigate the issue in some cases.

We will share further updates as soon as possible.

We have identified a root cause, and are testing and monitoring a potential fix for this issue.

Affected feature: Email Classic O365 Add-in

Users are experiencing authentication issues when logging in due to the refresh token expiring with the O365 add-in.

Our teams are investigating and will work to resolve this.

For the time being, it is recommend to have all affected users clear their browser cache/cookies, and perform a hard restart of the browser. Some users have reported successful authentication after performing these steps.

We apologize for the inconvenience. If you have any questions regarding this topic, please reach out to our support at support@staffbase.com.