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I get an error that says: "Invitation redemption failed;

Jennifer G 0 Reputation points
2026-05-23T23:57:51.6666667+00:00

I received an email from my organization to register for a website. I clicked on the link to register for the site. When I get to the site I sign in with my email address and a single-use code I received via email from Microsoft. Then I get a message that tells me to sign into invited account, which includes a link to "switch accounts". It seems that I am signed in on the wrong Microsfot account. There is a link to switch accounts. When I click the link to switch accounts, I get an error that says:  "Invitation redemption failed; An error has occurred. Please retry again shortly."

Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
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  1. Diana Mariz 8,685 Reputation points Independent Advisor
    2026-05-24T02:48:54.95+00:00

    Hi Jennifer,

    To check on this, have you tried to use difference browser or Incognito/InPrivate browser instead? As for the error message, the system expects the invited account, but your browser session is holding onto another identity.

    The quickest fix is to open the invite in incognito mode and sign in with the exact account that was invited. If that still fails, the organization’s IT admin must resend the invitation.

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  2. AI answer

    2026-05-23T23:58:09.04+00:00

    The behavior matches a Microsoft Entra B2B invitation redemption problem where the sign-in account does not match the account that was invited, or there is a conflict between identities.

    Use these steps to resolve it:

    1. Sign out of all Microsoft accounts
      • In the browser where the error appears, sign out from all Microsoft sites (for example, account.microsoft.com, portal.office.com, myapps.microsoft.com).
      • Close all browser windows.
    2. Use a private/incognito browser session
      • Open a new InPrivate/Incognito window.
      • Open the original invitation email again and click the invitation link from inside this private window.
    3. Make sure to use the exact invited account
      • When redirected to sign in, use the same email address that received the invitation.
      • If prompted to choose between a “Work or school” and a “Personal” (Microsoft) account with the same email address, select the account type that was originally used to register for the service (typically “Work or school” for organizational access).
    4. If you are asked to “switch accounts” again
      • Follow the “switch accounts” link and explicitly choose the invited account (the address that received the invitation) rather than any other Microsoft account already on the device.
    5. If the error persists, contact the inviting organization’s admin
      • Ask the site/tenant administrator to:
        • Confirm that the invitation is still valid and, if needed, resend it.
        • Check for common B2B redemption issues:
          • The invited user’s domain may disallow email-verified users from being created.
          • The external user might not exist in a federated domain.
          • There might be a proxyAddress conflict with an existing user.
      • These issues must be fixed by the admin in the inviting or home tenant before redemption will succeed.
    6. If the email address is used both as a personal Microsoft account and as a work/school account
      • This overlap can block creation of the guest/work account. The typical remediation is to rename the personal Microsoft account to a different email alias so that the work/school identity can be used cleanly for invitations and sign-in.

    If, after these steps, the same error continues, provide the full error text and correlation details (if shown) to the inviting organization’s IT/admin so they can investigate the B2B invitation redemption in Microsoft Entra ID.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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