TokenFactory IFrame Issue

It seems to me as an attempt to get an OAuth token to access Outlook via (OWA) can't be detected and results in a useless download.

I've documented it within this blog post:

Apple's Safari has an Outlook TokenFactoryIFrame issue (May 2022)

and asked MS answers forum moderators to forward the issue to the responsible Microsoft product group. Microsoft has to fix that issue.

Addendum (2022/05/05): The issue has been fixed - see the post from Microsoft Answers Forum:

Shyamal Debnath – MSFT
Microsoft Agent | Moderator
Replied on May 5, 2022
Hi All,
This issue was posted to the Service Health Dashboard (SHD) as incident EX375556, Start time: Monday, May 2, 2022, at 8:57 PM UTC.
User Impact: Users are repeatedly prompted to download "TokenFactoryIframe" when browsing Outlook on the web via Safari on Mac OS.
More info: Users report seeing the same download prompt when accessing office.com as well from the Safari browser.
Current status: The deployment of the fix has completed in the majority of the environments, and we've confirmed with some reporting users that the impact is remediated. We're continuing to monitor the progression of the fix as it finishes deploying to ensure the issue is resolved for all remaining environments.
Tenant administrators can view current information and updates on SHD at the link here https://portal.office.com/AdminPortal/Home#/servicehealth
For affected customers to easily identify the information here, this thread will be closed. We will update to the thread once the issue is resolved or you can obtain the most recent information from SHD.
Your patience and cooperation are highly appreciated.
Best regards,
Shyamal