Forum Discussion
How can we know which email address the external user used to register inside the office 365
Have you checked the SharePoint settings within your tenant?
Have you asked the guests if that's what they're doing? (i.e.: receive the invite on Gmail and log in with Microsoft email address)
Also, have a look at the External Sharing Overview documentation on what's the impact of sharing sites with external users (Microsoft & non-Microsoft email addresses).
Veronique Lengelle Thanks for your reply. now my question was specific to our case, and not a general question about external sharing.
Anyway to answer your points; now in our case we did not select any option inside the "Advance setting for external sharing", so this mean external users can register using different email address. also i already know how external sharing works and what is the impact, but in our tenant we restrict external sharing to the office 365 admin only... anyway i still did not get the answer for my original question.
- It will create the account based on the account you login with when you accept the invitation for access. So whatever the login name is, or e-mail shows in portal.azure.com for the guest user is what they used.
99% of the time when you have this problem it's due to them already being logged into another Microsoft account when trying to access a resource link that they accepted on another Microsoft account and or they have SSO and corp Office 365 already logged in trying to access resources invited to their hotmail. It's annoying and I wish They would redesign that screen so that you get a list of accounts you have saved that you can use to try and access the resource so you can easily just click your logged in personal Microsoft Account for exampled.ChrisWebbTechi do not think the user is sign-in with another account, as from the error message it says "we are sorry, but *** can not be found in ***" .. and from the error message it is referring to the correct username (***)!!! and if the email address shown in the admin center's guest account, is the account that need to be used and it is the same as the account showing in the error message, then there is something weird... as the account is already registered as a guest account + added inside the members sharepoint group, so why the user is getting that his email address can not be found "user not in directory"!! while it is found in the Guest user list and inside the SharePoint members group..
