My desktop outlook app will not open

I started having the same problem a few months ago on my W11. It's been occurring about once a week. I've been using the suggestion to right-click Start > Installed apps then located Outlook and selected the repair option. This had worked previously but not today. Thank you for this suggestion. It worked for me. Now, if only the problem will stop reoccurring.

just ran into this problem and your solution fixed it!! thank you Alex

I hope this back door opening helps people. I would always go to classic even when my new outlook email would open. the Start Run Outlook.exe works for me or classic and I just go to that. The Outlook icon pinned to the task bar does absolutely nothing after working fine for a long while. The entry to outlook via MS 365 does absolutely nothing as well. I gave up and use the Start Run process bc I want to use classic Outlook mail anyway. Sad that MS gives us crap for our money but it is what it is.

I think that you can go to your start menu. It will pop up a list of frequently used apps. But there is also an option to list all of your apps. Click on that option. From the list of apps, scroll down to Outlook, and right click on it. That should give you an option to pin it to your taskbar. Once it is on your task bar, then you can right-click on the Outlook icon and see a list of Outlook options. Click on the Calendar app. It should come up. Then you should be able to go to the upper left corner of the Calendar app, and click on the Mail app. Magically, it should come up that way. I call it the back-door approach. Once you get Mail running, when you are done with it, it is easier to just minimize Mail instead of closing it. Then, in your next Mail session, you can just click on the icon in the task bar and the Mail app should pop right up.

right click Start

enter Run Outlook.exe and you get the classic outlook