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Evotec Services sp. z o.o., ul. Drozdów 6, Mikołów, 43-190, Poland

Microsoft Outlook – Cannot start Microsoft Outlook. Cannot open the Outlook window.

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When working on Windows Server 2016 on RDS session one of the users reported he cannot start Outlook. He gets following error message:

Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened. Microsoft Exchange is currently busy. If this message is still displayed in 30 minutes, contact your Exchange administrator.

Solution - Delete users mail profile

Exit Outlook, and then do one of the following:

Start > Control Panel > Mail

Or

Choose Start and in the Search programs and files box, type Control Panel, and then choose Mail.

Mail Setup - Outlook dialog box that is accessed through Mail settings in the Control Panel

Note: There are different paths you can take to get to Mail settings in the Windows Control Panel. The path you take might depend on which Windows operating system you're using, and which version of Outlook is installed.

  1. Choose Show Profiles
  2. Delete old profile.
  3. Add new profile.
  4. In the Profile Name box, type a name for the profile, and then choose OK.

Note: It didn't work for us but it may work for you…

Solution - Outlook Reset Navigation Pane

Next idea was to reset navigation pane. Just right click on Start, choose Run and type in outlook.exe /resetnavpane.

Note: it didn't work for us but it may work for you…

Solution - Run Outlook in Safe mode

Another idea was to run Outlook in Safe Mode. Just right click on Start, choose Run and type in outlook.exe /safe

Note: it didn't work for us but it may work for you…

Solution - Run SARA / ADFS issue

Since we've run out of standard ideas we had to use weapon of mass destruction. We've run Microsoft SARA (Support and Recovery Assistant) for Office 365The tool is very powerfull and can fix many issues but in our case it just displayed and error.

With that information in hand we knew this has to be related to our ADFS server. But since it worked fine for other users it has to be just local to that profile. Since ADFS/Outlook uses Internet Explorer to do that connection we've decided to reset IE to its defaults.

After that simply logging out of the machine, loggging back in … and .. Outlook is working again!

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