Also, do not reuse old SMTP email addresses and apply them to new accounts. Office 365 will automatically route it to the new one. Some people will likely continue to send email to the person's old email address and deleting it may result in NDR failures. We strongly recommend that you don't remove the old email address. What to do with old email addressesĪ person's previous primary email address is retained as an additional email address. After the change has taken effect, the person will have to sign in to Outlook, Skype for Business and SharePoint with their updated username, so be sure to tell them about this change. It might take up to 24 hours for this change to take effect across all services. Review the user information and try again, see Resolve error messages. If you get the error message ' We're sorry, the user couldn't be edited. In the Display name box, type a new name for the person, and then select Save. Select the user's name, and then on the Account tab select Manage contact information. If their password changed too, tell them that they will be prompted to enter the new password on their mobile device, or it won't sync. If they have shared files from their OneDrive, then the links to the files may not work and the user can reshare. If they have OneNote notebooks in their OneDrive, then they may need to close and reopen them in OneNote. If they are using OneDrive, tell them that the URL to this location has been changed. If they are using Skype for Business Online, tell them they will need to reschedule any Skype for Business Online meetings that they organized, and that they will need to tell their external contacts to update the old contact information. They'll need it to sign in to Office 365.

This change may take a while to take effect. Tell the person the following information:

You'll see a big yellow warning that you're about to change the person's sign-in information.

If you don't see the option, you don't have permissions to change a user's name and primary email address. IMPORTANT: You will only see this option if you're an Office 365 global admin. Select Set as Primary for the email address that you want to set as the primary email address for that person. Select the user's name, and then on the Account tab select Manage email aliases. In the admin center, go to the Users > Active users page.

Cannot change skype name