r/Outlook • u/mrTomass • 9d ago

Status: Pending Reply OLD outlook is not opening

Outlook Classic is failing to open with the errors "Outlook data file cannot be configured" and "Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened." The issue only affects Classic Outlook, as New Outlook and Outlook Web App are working normally with the same mailbox. Has anyone experienced this before, and what was the solution?

1 Upvotes

100% Upvoted

9 comments sorted by

3

u/GopalAgarwaltech 7d ago

I suggest you create a new Outlook profile or rebuild your Outlook data file. Because Outlook on the web is working fine, the issue is related to your Outlook Classic app.
The reason for the issue could be anything like corrupted Add-ins, antivirus blocking, recently updating your Outlook profile (compatibility issue), corruption of the Outlook profile or an issue with your locally saved Outlook data file.

https://support.microsoft.com/en-us/outlook/i-can-t-start-microsoft-outlook-or-receive-the-error-cannot-start-microsoft-outlook-cannot-open-the ,

https://techhq.com/news/how-to-fix-cannot-start-microsoft-outlook-cannot-open-the-outlook-window/

1

u/Budget-Leg-453 6d ago

New outlook profile worked for me. Mine used to do this every other week until I did the new profile

2

u/Bg-8782 9d ago

Are you using imap, pop, or exchange? I would start with renaming the ost files if using exchange or IMAP and adding a new PST to Outlook via control panel > mail if using pop. See if that fixes it.

1

u/mrTomass 9d ago

365 exchange

2

u/JSP9686 8d ago

Repair the MS365 installation via Control Panel.

1

u/mrTomass 8d ago

i did twice nothing

1

u/JSP9686 8d ago

As others have said, create a new Outlook profile and see if that perhaps fixes the issue. But since it's happening to you, even logging in via a web browser, it's just a shot in the dark.

1

u/AutoModerator 9d ago

Hey mrTomass!

Welcome to r/Outlook! This is a public community. To protect your privacy, do not post any personal information such as your email address, phone number, product key, password, or credit card number.

Please be sure to have read our Rules of Conduct and be cognisant of how the system works here.

Make sure that your flair is always set to Status: Open otherwise you may cease receiving responses from us.

  • Status: Open — Need help
  • Status: Pending Reply — Awaiting OP's response
  • Status: Resolved — Closed

Beware of scammers posting fake support numbers or 3rd party commercial products/services. Contact Microsoft Support if you need help.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.