Access denied for the resource.

Question

hi

i have this problem when i open my email on outlook 365

This is error message : **Correlation Id:771f167a-f9e6-43a5-a0f1-3d93c22ebb1aTimestamp:2025-05-10T14:04:05.000ZDPTI:a7ae91fe266376e564a2c113eba9bf895a9d00cb5ccd609f5cfb4639b6445582Message:**Access denied for the resource.**Tag:4usqaCode:**3399614475I need urgent solution

you can call me on this mobile : ************

Answer 1

I was getting the same errors as Hamed4.

The solution that worked for me was item #3 in the reply from Doris V.

1. Go to entra.microsoft.com
2. This would redirect to a Microsoft sign in page.
3. I put in my email address and it takes me to my organization's sign-in page and I put in my password and sign-in.
4. The Entra portal loaded to its home page
5. Use the search field to search for Protection API and it finds Microsoft Information Protection API (In the Enterprise Applications category)
6. Click that item and it should load the Protection API screen.
7. In the left panel click "Properties" in the "Manage" section.
8. In my screen there was just one item shown
9. Change the "Enable for users to sign-in" from No to Yes.
10. Click Save.

After doing these steps I opened Outlook and it signed-in and retrieved the latest messages.

Hopefully others are able to resolve this issue as well.

Answer 2

Dear hamed4,

For the situation you’ve encountered, I do understand the inconvenience caused and feel very sorry about it. Based on the error message you provided, here are several steps you can try to restore access to your Outlook account:

1. If You Are Using Outlook Desktop App:

• Creating a new Outlook profile and reconnecting your account. For reference: Create an Outlook profile - Microsoft Support
• Open Outlook > go to File > Account Settings > Account Settings.
• Double-click your account and uncheck the box labeled "Use Cached Exchange Mode to download email to an Outlook data file."
• Close Outlook, restart your PC, and check if the error persists.

2. If You Are Using Outlook Web:

• Clear your browser's cache and cookies, then restart the browser.
• Open an incognito/private browsing window and try accessing Outlook again.
• Try logging out and then logging back into your Microsoft account.

3. Adjust Settings in Microsoft Entra:

• Go to Entra and find the resource "Microsoft Information Protection API" (Application ID: 40775b29-2688-46b6-a3b5-b256bd04df9f).
• Navigate to Properties in the left sidebar.
• Ensure that "Enabled for users to sign in?" is set to "Yes".

4. Contact IT Support for Further Assistance:

• If none of these solutions work, I highly recommend contacting your IT Administrator to raise a support ticket via the Microsoft 365 Admin Center. A technical support agent will be able to assist you faster through a remote session, checking logs and configurations to apply the necessary fixes. For detailed instructions on how to get support, please refer to Get support - Microsoft 365 admin

Please let me know if any of these steps help or if you need further guidance. I hope this issue gets resolved quickly!

Best regards,

Doris V - MSFT | Microsoft Community Support Specialist

Answer 3

Just go to Entra portal, look for the app id (40775b29-2688-46b6-a3b5-b256bd04df9f) under enterprise application and enable the app under "Properties".

Answer 4

this the error message coming when i open Microsoft outlook 365

Correlation Id: 718fbb4b-2d16-4ea2-8dbe-88f8b9869960Timestamp: 2025-05-11T08:52:07.000ZDPTI: a7ae91fe266376e564a2c113eba9bf895a9d00cb5ccd609f5cfb4639b6445582Message: Access denied for the resource.Tag: 4usqaCode: 3399614475

and also this message if i send one email