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#OUTLOOK 365 CANNOT START MICROSOFT OUTLOOK HOW TO#
#OUTLOOK 365 CANNOT START MICROSOFT OUTLOOK WINDOWS#

It is possible that the files of previous Outlook versions are not supported by the present version. Restore Outlook Files to Previous Versions But for that, the Outlook application should be accessible at first. You can either delete all the Outlook add-ins through Outlook Options settings or delete the suspicious ones.

If the Outlook runs without issues, then the problem is in certain Outlook add-in.

Note: Confirm that there is a space between outlook and / safe.

#OUTLOOK 365 CANNOT START MICROSOFT OUTLOOK WINDOWS#

Move to the Windows Run box and type outlook /safe and click OK.To check whether add-ins interference is the issue, run Outlook in Safe mode. You need to unselect this option (if selected) and then finally click OK to save this setting. In the Properties dialogue box, switch to the Compatibility tab and check if the option Run this program in compatibility mode for under Compatibility mode is unselected.Now, right-click on the OUTLOOK.EXE file and click Properties.On your system, type outlook.exe in the Search box and then right-click on the file name and select the Open file location option.Running Outlook in Compatibility Mode can be a reason for this error. The general file location isĬ:\Users\Username\AppDatae\Roaming\Microsoft\Outlook\Outlook.xmlĭisable the Compatibility Mode for Outlook If the error is still there, you can navigate to the Outlook.xml file location and delete it from there directly.Restart the Microsoft Outlook application. It would regenerate the Navigation Pane settings for the Outlook XML file.Note: Ensure the space between outlook.exe and /resetnavpane and take the backup of the Outlook.xml file at a different location before performing this. Now type “outlook.exe /resetnavpane” and click on OK. Open the Windows Run box by pressing the Windows button and R key on the keyboard together.If you are facing this error, the Navigation Pane Settings for Outlook XML file may be corrupted and so try resetting it. Restore Outlook Files to Previous Versions.Disable the Compatibility Mode for Outlook.Troubleshooting and Fixing “Cannot Start Microsoft Outlook Invalid XML” Error If the file is 0KB, then it is sure that the XML file for Outlook is corrupted. Outlook users can verify that Outlook.xml file corruption is the cause behind the error “Cannot start Microsoft Outlook invalid XML” by checking the size of the Outlook XML file at the location – C:\Users\Username\AppDatae\Roaming\Microsoft\Outlook.

#OUTLOOK 365 CANNOT START MICROSOFT OUTLOOK HOW TO#

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.Download Now How to verify Outlook.xml file corruption? If the response is helpful, please click "Accept Answer" and upvote it.

Please try to re-create a new outlook profile and then run the “outlook /safe” in the run to open the outlook as safe mode.ĥ.In Exchange 2016, MAPI over HTTP is enabled by default at the organization level, please run the following command to check the user whether enable the MAPI: Get-OrganizationConfig | fl mapi.

Please try to log in to OWA using the issue mailbox to see if you can log in and open the shared mailbox.

So would you like to share with me how you logged in？ As a result, users can't log into them directly. According to my research, the shared mailbox is a type of user mailbox that doesn't have its own username and password.

In order to better solve the issue, I would like to confirm with you the " sign in using share mailbox" you mentioned.

Does the issue occur to only one user or do all users have the issue?