Cannot add email account to outlook app on iOS

Anonymous
2026-06-25T03:20:49.4266667+00:00

I repeatedly receive the following error message when I try add a personal email account to the outlook app on iOS: AADSTS165000: Invalid Request: The user session context is missing. One or more of the user context values (cookies; form fields; headers) were not supplied, every request must include these values and maintain them across a complete single user flow.

Please help me fix this.

Outlook | Outlook for mobile | Outlook for iOS | For home
0 comments
Answer accepted by question author
Ben4724 4,480 Reputation points Independent Advisor
2026-06-25T04:08:51.14+00:00

Hi there!

Based on the error message you provided, it usually happens due to expired or blocked cookies, browser restrictions on iOS, corrupted app data, or network interference from a VPN or security app breaking the authentication flow.

I suggest to try the following first:

  1. Force-close and relaunch Outlook**
    2. Restart your iPhone or iPad
    **3. Check for iOS and Outlook app updates
  2. Clear Safari cookies and website data on your iOS device.
  3. Ensure Safari is not blocking cookies. In Settings → Safari, make sure Block All Cookies is turned **off

**Once you have completed steps 1-5, try to setup your account again. If you are connected to a VPN, make sure to turn it off first then try to add your account on the app.

Was this answer helpful?

1 person found this answer helpful.
0 comments

0 additional answers

Sort by: Oldest
Most helpful Newest Oldest

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.