AAD B2B account creation failure - "An unexpected error occurred. Please try again"

Hi Chao,

No, it means it "unblocked" the Domain reservation of my customer and now he was able to accept the invite. You will need to check with MS support if your situatio is the same.

MS also suggested:

- to delete the accounts in my tenant for that Domain and resend the invites.

- to always accept the invites in an InPrivate/Incognito browser session.

My conclusion:

If this error occurs again, create a support ticket with MS so that the domain can be "unblocked" and allow the registration process to succeed. This fix is done per Domain and is not a fix that "unblocks" any other scenarios having the same or a similar issue.

I hope this helps others.

Nelson Morais