Cannot open Outlook in Office 2016 RRS feed

  • Question

  • Just installed MS Office Home and Business 2016. Cannot open Outlook. Error message: Cannot start MS Outlook. Cannot open the Outlook Window. The set of folders cannot be opened. The Outlook Data File ( was not cleanly closed by the last program that used it It cannot be opened until repaired. Where do I repair it and where did ".pst" come from that is on the end of email address ? Help please.
    • Moved by Lynn-Li Thursday, July 20, 2017 7:44 AM Move to proper forum
    Wednesday, July 19, 2017 5:21 PM

All replies

  • I recommend that you post this in the Outlook Forum:  http://social.technet.microsoft.com/Forums/en-US/outlook/threads

    Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."
    Celebrating 20 years of providing Exchange peer support!

    Wednesday, July 19, 2017 11:46 PM
  • Hi,

    Did this issue happen the first time you tried to start Outlook after you installed Office 2016?

    Which type of email account are you using? Exchange, POP3 or IMAP?

    Can you start Outlook in safe mode? To do this, press Windows key + R to open Run command, type outlook /safe and press Enter.

    >>Where do I repair it and where did ".pst" come from that is on the end of email address?

    To repair your PST file, you need to use the Inbox Repair Tool (Scanpst.exe). For your convenience:


    Besides, we may also try creating a new Outlook mail profile and then set up your email account in the new mail profile to see whether this issue continuous. To do this, please follow the instructions in this article:


    Hope this helps.


    Steve Fan

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    • Proposed as answer by Steve Fan Tuesday, July 25, 2017 1:40 AM
    Thursday, July 20, 2017 8:18 AM
  • Finding root cause for this issue, is not easy, could be several reasons, like incorrect profile configuration. OST/PST data file corruption issues, which was not synched. Or corruption in the Navigation Pane settings file- profile_name.xml (profile name is the name of Outlook profile).For now, I can say,  repair Navigation Pane Configuration file and see, if you are still facing trouble.

    For fixing “Cannot Start Microsoft Outlook” error, you can refer to the article below to fix your issues:


    Hope it might help you !!
    • Edited by aliceaggie Wednesday, August 9, 2017 7:19 AM
    Wednesday, August 9, 2017 7:19 AM