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Unable to access Microsoft Office products on a web browser

sb 20 Reputation points
2025-08-22T00:49:21.54+00:00

Help! I received a work/school account through my job last year. Since the account was created I have had access issues with Microsoft office products on web pages. For most of the time I have been unable to log into Microsoft office products on a web browser, however randomly it has worked for a day or two a total of 4-5 times over the past 18 months. There is not discernable pattern of why I suddenly was granted access to use the web browser or what caused it to go away. My colleagues are able to access Microsoft Office products on web pages without issue.

I am however able to access the desktop app and upload the items to OneDrive (for example, I can use excel, share an excel sheet with other users in my organization, but cannot open the same excel sheet online on the same computer).

I have tried the following items-

  • Tried logging in on a different laptop on home wifi: 1/4 laptops I was able to log in on (it is not my laptop though so this is not a viable solution). This laptop I was successful logging in with has a VPN
  • Tried different web browsers including Edge, Firefox, Safari
  • Removed VPNs
  • Removed/Readded accounts from my work laptop
  • Restarted/updated the computer
  • Clearing cookies/browser data
  • Incognito window
  • Deleted Microsoft 365 Copilot application off my work computer

Times I have successfully logged in

  • Personal cell phone on home wifi
  • On work wifi at my work computer (in same session it did not work to log in on personal laptop on the same wifi)

Please see following screenshot of the error I receive below. It will say this same error for Outlook, Teams, etc.

User's image

My IT department has not been able to identify the issue. Any advice is much appreciated!!

Microsoft 365 and Office | Office Online Server
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  1. Michelle-N 4,105 Reputation points Microsoft External Staff Moderator
    2025-08-22T03:18:27.7866667+00:00

    Hi @sb

    Thank you for posting question to Microsoft Q&A.

    Based on the evidence you've provided, especially the specific error message "Access to Microsoft Exchange Online is blocked by your organization's security policy" and the fact that using a VPN allows you to connect successful, this issue points almost certainly to a Conditional Access policy configured by your IT department in Microsoft Entra. 

    However, due to security and privacy concerns, I will need you to chekc with your IT department to investigate the following specific areas: 

    -Review Conditional Access Policies: They should check for any policies that apply to your user account and target cloud apps like "Office 365 Exchange Online" or the broader "Office 365"  

    -I'd like to confirm: does the issue only occur on your personal device while it's connected to the corporate network? 

    -You mentioned that a VPN worked. Was this a personal VPN service, or was it your company's official corporate VPN? 

    -When you tested on four different laptops and your iphone at home, where they all on the exact same Wi-Fi network? Was the one laptop that worked a personal device or a company-managed one? 

    Thank you for your patience and understanding. The information you’ve provided will be essential in helping me find the correct direction for your situation.

    If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".   

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    1 person found this answer helpful.

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