Note: AOL and Verizon customers who need to update their account settings after AOL's recent change to their server settings should see the section Update your email settings in Outlook for PC.When checking your encryption settings, make sure they're set to SSL, SSL/TLS, or Auto and not TLS only.After the change has taken effect, the person will have to sign in to Outlook, Skype for Business and Share Point with their updated username, so be sure to tell them about this change.If they are using Exchange Online or if their Office 365 account is linked with your organization's on-premises Exchange environment, you may see this error when you try to change a username and email address: "This user is synchronized with your local Active Directory.Some details can be edited only through your local Active Directory." This is due to the Microsoft Online Email Routing Address (MOERA).The MOERA is constructed from the person's user Principal Name attribute in Active Directory and is automatically assigned to the cloud account during the initial sync and once created, it cannot be modified or removed in Office 365.
Following the suggestion in the warning message we can go ahead and disable the email address policy to be able to make the change to the mailbox. Henderson | Get-Member Email Addresses Type Name: Microsoft. He works as a consultant, writer, and trainer specializing in Office 365 and Exchange Server.
Using an app password lets Gmail, Yahoo, and i Cloud confirm that you're the person accessing your email.
See Set up two-factor authentication for Gmail, Set up two-factor authentication for Yahoo, or Set up two-factor authentication for i Cloud for information on how to generate an app password. Note: For all email accounts, your username is your full email address.
The setup process can take up to 4 hours to complete.
Wait a while so the set up process has time to finish, and then try again.