Outlook App opening a browser Tab

Anything new? Daniel Tony1, could you provide a link to your post?

We now have a second employee dealing with this. She was away for a short vacation and I installed Dell Command updates on her system and 5 or 6 others. She logged in to her PC and launched Outlook like she does every morning. The browser opened with Outlook login requirements, she did those (inlcluding MFA), and now the blue envelope animation opens in a browser tab when she closes and opens Outlook. I stood over her shoulder and watched all this happen. Nothing looked unusual, except for getting a login prompt in the browser. I just assumed it was MS365 wanting the periodic authentication (which has been VERY inconsistent, but that's why this seemed to be filling that need).

Known issue. SI - EX494812

I think this is where the preference file is located... C:\Users<username>\AppData\Local\Google\Chrome\User Data\Default

Ah, great. Thanks! Like I suspected, our settings are located in the same area, but in a Microsoft\Edge folder instead of Google\Chrome. I'll focus there and see if I can figure anything out. Thanks again for the reply!

I think this is where the preference file is located... C:\Users<username>\AppData\Local\Google\Chrome\User Data\Default

I was having the same issue with one particular user. I downloaded and ran demo Malwarebytes version, and it removed a setting in the users Chrome - User Data - Default - Preferences folder. After that setting was eliminated, no more pop-up browser page when Outlook starts.

Thanks for the reply. I tried this but MB didn't find anything to change. Any idea what setting it was? Also, I'm looking in Chrome's settings and don't see "User Data - Default - Preferences". Is this a Windows folder area or Chrome settings?

We use MS Edge, but it's built on Chrome's engine, so this may be the clue that I need. Thank you for any further input!