Login Issue

Question

Login Issue

Jawad Almubarak 0

I am trying to sign in to teams and the rest of the windows apps with my work/school account, but it doesn't show me the password screen, it only shows me the 404 http error and then when I close that it shows me error 2603. When I try using my personal account or on the web versions of the apps, it works flawlessly.

If anyone knows a surefire solution please share it.

Thanks

0 comments

1 answer

Your answer

Answer 1

Alina Le 4,905 Independent Advisor

Hello Jawad,

To help narrow down the issue, might I confirm the following:

1/ Might I confirm whether this issue occurred from the first sign-in attempt, or was the account previously working normally on this device before it started happening?

2/ Besides Teams, do you see the same behavior in other Microsoft 365 desktop apps such as OneDrive, Outlook, Word, or Excel?

3/ Could you share a screenshot of the HTTP 404 error and Error 2603? Please remove any personal information before posting it publicly to protect your personal information.

4/ Is this account provided by your school or organization, and are any other users experiencing the same issue?

Besides, I'd like to share a few troubleshooting steps and some screenshots I prepared to help you check whether they can identify the cause of this behavior.

1> Reconnect the Work or School account in Windows

Go to: "Settings" > "Accounts" > "Access work or school"

If the account shows any warning, error, or"Sign in again" message:

Select the account->Disconnect it-> Restart the PC.
Reconnect the work/school account.
Try signing in to Teams again.

User's image

2> Clear cached Microsoft credentials

Open: "Control Panel" > "Credential Manager" > "Windows Credentials"
Remove entries related to: Office: Teams/ OneDrive/ AzureAD/ ADAL/ MicrosoftOffice.

Then:

Restart the PC.
Launch Teams or another Microsoft 365 app and sign in again.

User's image

Note: You may need to sign back into Microsoft applications after removing the cached credentials.

I hope I've been able to help in some way. Please keep me posted

Kind regards,

Jawad Almubarak 0 Reputation points

2026-09-02T14:40:27.5366667+00:00

No this is the first time this is happening, when it happened in teams it started happening in other 365 apps after I signed out of them. And its is provided by my school/organization.
Jawad Almubarak 0 Reputation points

2026-09-02T14:41:41.85+00:00

@Alina Le
Jawad Almubarak 0 Reputation points

2026-09-02T16:24:27.2866667+00:00

@Alina Le I kindly wait for your reply, please do as soon as possible because I want to solve the problem.
Alina Le 4,905 Reputation points Independent Advisor

2026-09-03T00:23:31.55+00:00

Hi,

Based on the information you have provided, the above steps are recommended for your reference. Please try them, including Step 3 below, and let me know the results so that I can continue troubleshooting the issue with you.

3/ Check VPN, Proxy, and Network Security Settings

Since the error occurs while connecting to Microsoft's sign-in service, Windows may be using an incorrect or outdated network routing setting (proxy). To rule this out, please try:

netsh winhttp reset proxy

Then restart the device and test the sign-in again. This simply removes any proxy configuration and restores a direct connection to Microsoft services.

In addition, if you are using a VPN, web filtering, antivirus, or other network security software, please temporarily disable it and test the sign-in again.

As the error specifically references login.microsoftonline.com, we would like to rule out any network-related configuration that may be preventing the Windows sign-in component from reaching Microsoft's authentication service.