Anyone else seeing this? I'm getting error message ... Your Outlook Data file cannot be configured. c:users\p.....\AppData\local\Microsoft\outlook\p....r.nst. This started right after the upgrade to Office 365 ProPlus, Insider Slow 1705 8201.2025, on 5/24. This occurs when ... Skype For Business is running. Outlook on the desktop is not running. As soon as I launch Office on the desktop (and keep it running), the errors stop. When outlook is stopped, the errors start again. The errors occur about every 1 minute or less.

I change SKYPE configuration for meeting reminders and it seems solved. Option is in Skype Meetings, "Don't show notifications when Outlook is running". It doesn't matter witch option you choose, just change it. Hope it helps. Jacinto

+1, It happens when Outlook is not running and Skype for Business is running.

Same here. I thought that my .OST file from my primary mail account had corrupted so deleted all my mail accounts and downloaded over 35Gb of mail again... only to experience the same problem with Skype for Business once I'd closed Outlook after hours of no problems.... I'm running Windows 10 Pro x64 and the same release as below (Office 365 ProPlus, Insider Slow 1705 8201.2025, on 5/24.). Every time that the error message comes up (from Skype for Business) I've noticed that a new 16,024kb size Outlook data file is created in the C:\Users\<user>\AppData\Local\Microsoft\Outlook folder. I guess it must be a bug in this release..

I am getting the same thing on all my users. I guess i learned my lesson not to be in the first release track for my office365 domain.

Data File cannot be configured SkypeForBusiness/Outlook

Steve Wierenga
Copper Contributor
May 30, 2017
I have the same issue in Windows 7 64 with O365 version 1705. The only way I found to alleviate the issue with this version is to disable cached exchange mode in Outlook. However, this makes Outlook slow. I am rolling back office to 1704 with:
C:\Program Files\Common Files\Microsoft Shared\ClickToRun>officec2rclient.exe /u
pdate user updatetoversion=16.0.8067.2115

The rollback processed without error after closing Outlook and Skype. I reenabled cached exchange mode in Outlook and so far, it seems to have resolved the issue.
- PBeiler1
  Steel Contributor
  May 30, 2017
  Yes, I'm hoping for a fix from Microsoft. However, this also prompts me to use Skype for Business in the browser. I'm probably one of the few that use the browser for my Office365 email. And it is my job to stay in touch with all the options.
  
  Interesting comment on the email ... I started using the browser for O365 email so I would understand it and could support it, and discovered I like it better. There are a few things for which I switch to Outlook-on-the-desktop, but that occurs maybe once every 2 weeks.
  - Lubo Galabov
    Copper Contributor
    May 30, 2017
    I am planing to roll back to 1704. So far we have only issues with 1705, mostly WIndows 7 machines.
Saul Castro Espino
Copper Contributor
May 31, 2017
This problem appeared in my organization when updating to the version of O365 that you indicate. In my case, we did report with MS and they confirmed to me that this update has had several reports of failures so they have blocked it in its distribution. The suggestion that the own MS gave me was to reinstall the version of office 2016 in a "current channel".
Freddy Schär
Copper Contributor
Jun 01, 2017
Office Insider Slow Update 8201.2064 solved this .NST issue
- Freddy Schär
  Copper Contributor
  Jun 01, 2017
  However,
  this bug still persists. Printing a Contact Memo Sheet. Text way to small and tiny. I tried to adjust the Font size. No success. On all PCs with Office Build 8201.2025 Insider Slow and Office Build 8201.2064 Insider Slow the same issue.
  
  I've got a message from the Office Insider Team. The confirmed this issue and are working on a solution.
  - Ran Mo
    Microsoft
    Jun 08, 2017
    Dear team,
    
    I am MS support. My customer was using 1705（8201.2025）and had the nst file issue and caused Outlook to crashed described below:
    https://answers.microsoft.com/en-us/msoffice/forum/msoffice_sfb-mso_win10/your-outlook-data-file-cannot-be-configured/b60d74c5-7138-4c7b-852e-2488c97e8e26
    
    I suggested him update to Version 1705 (Build 8201.2075 Click-to-Run) but still Outlook got crashed. Can I know if the crashing issue is still not fixed in Version 1705 (Build 8201.2075 Click-to-Run) ? If so, as the above article metioned, crashing issue was fixed in Version 1705 (Build 8201.2064), how can we revert back to this version from 8201.2075?
    
    Thanks in advance.

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Data File cannot be configured SkypeForBusiness/Outlook

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