That's most likely because you already have Outlook running.
Running this command with Outlook closed will not load Outlook itself but trigger OLCFG.EXE from the Outlook installation directory.
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Per https://support.microsoft.com/en-us/office/edit-an-outlook-profile-e93ea161-f742-4119-bfa1-9dca4c3e48fa - one of the ways to edit Outlook Classic profiles is to open the Control Panel and use the Mail applet. With Windows 11 discontinuing the Control Panel in an upcoming release, where should administrators go to access that functionality (especially when a broken profile is preventing Outlook from opening even in Safe Mode)?
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That's most likely because you already have Outlook running.
Running this command with Outlook closed will not load Outlook itself but trigger OLCFG.EXE from the Outlook installation directory.
Do you know if this will work even if Outlook won't open due to profile corruption? When I run that on my system, it opens the main Outlook window before pulling up the profile manager.
You can open the dialog via a Start Menu Search or command line as well; outlook.exe /manageprofiles
Additionally, see; No Mail icon in Control Panel - Robert 365