Hello Kelly Nicoll
Thank you for reporting this issue and I apologize for any inconvenience this may have caused.
I've seen several users with the same problem. This mainly happens on Android devices, especially Samsung. Could you tell me if you use a Samsung or another device?
In addition, I found a method that could help you:
Follow the steps below:
1/ Settings -> Search for "Android System WebView" -> App details in the store -> Remove updates.
2/ Restart the device.
3/ Settings -> Search for "Android System WebView" -> App details in the store -> Update.
Note: If "Android System WebView" doesn't appear in the list of apps, go to: Settings -> Google -> All Services -> System Services -> Select "Android System WebView".
4/ Restart the device.
5/ Open Outlook and sign in.
Reference: My Microsoft Apps have stopped working on my Samsung Ultra S25 - Microsoft Q&A
Please try this solution and let me know if it works for you. I look forward to your comments.
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