How to get past error when setting up new email

Question

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server_error: The contextID supplied in the request did not have a matching cookie

Answer 1

Hi Debbie Hagen,

The error message you are seeing often points to a temporary issue with the sign-in session rather than a problem with the email address itself. The authentication information stored by the browser may no longer match the current account setup request.

To help isolate the issue, try these quick checks:

1. Use a different browser (for example, Edge, Chrome, or Firefox) and attempt the account setup again.
2. If you have multiple Microsoft accounts signed in, sign out of all accounts first, then start the new email setup from a fresh browser session.
3. Try the setup from a different network connection, such as a mobile hotspot, to rule out any connection or filtering issues affecting the sign-in process.

If the account creation works in another browser or network, that can help narrow the issue to the local sign-in session or browser environment.

I hope this helps point you in the right direction. Let me know if you need further assistance, feel free to ask me by clicking "Add Comment" or "Add Answer" if you cannot add comment so your response will be visible. Thanks for your effort.

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Answer 2

This error is typically caused by a broken sign-in session where the request cookie does not match the current authentication flow.

Try these steps in order:

1. Clear the browser cookies for the Outlook sign-in page.
   • In the browser address bar, select the lock icon.
   • Open Cookies.
   • Remove the listed cookies one by one.
   • Reload the page.
   • Try signing in or setting up the account again.
2. Try the setup again in a private browsing window.
   • Use Incognito or Private Mode to avoid stale session cookies.
3. Temporarily disable anything that can interrupt sign-in.
   • Turn off browser extensions such as ad blockers.
   • Turn off VPNs or similar privacy/security tools during setup.
4. If this is happening in an app on a mobile device, refresh the app state.
   • Clear the app cache/data if available.
   • Remove the Microsoft account from the device and add it again.
   • If needed, uninstall and reinstall the app.
5. On iPhone or iPad, check Safari cookie settings if account setup opens a web sign-in page.
   • Go to Settings > Safari.
   • Make sure Block All Cookies is turned off.
   • Clear Safari website data, then try setup again.

If the issue continues after these steps, use Microsoft Support for Outlook > Sign-in and account creation and provide the exact error text.

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References:

• Outlook login error: contextID cookie mismatch - Microsoft Q&A Why am I getting this error when I try to log into Outlook: "server_error: The contextID supplied in the request did not have a matching cookie"
• Unable to Create Outlook Account using Web Version however getting error when using Outlook App - Microsoft Q&A Unable to Create Outlook Account using Web Version however getting error when using Outlook App
• trying to add my Outlook account for my new samsung z-4 phone - Microsoft Q&A trying to do Add Account for outlook for my new samsung z-4 fold phone (replaced due to phone not working).
• Cannot add email account to outlook app on iOS - Microsoft Q&A