I noticed a while back that Office ProPlus will occasionally prompt the user for credentials either as part of logging into the application for activation or the “call us overprotective” prompt. But your SIP address should match your email address, especially if you plan to communicate with federated partners. The UPN in Office 365 becomes the default SIP address in Skype for Business Online. You may want to consider making their UPN an alternate email address on their account as users are bound to get confused here it won’t help them login but it will if an email response is expected and they enter the wrong value. As you’ll see below, there are some prompts that will say “enter your email” but they will, in fact, need to use their UPN. Your users will need to understand what their UPN is and that it is the login for all things Office 365 related. For example, User Principal Name can be or while user’s email can be Or if you migrated from on-premise Active Directory to Office 365 online you UPN still can look like this: “DOMAIN\username”īut even though Office 365 does not require that users’ email matches User Principal Name it is very important to make is such. Office 365 does not require that users’ email matches User Principal Name. The User Principal Name is basically the ID of the user in Active Directory and sometimes might not be same as users’ email.
In the Windows operating system’s Active Directory, a User Principal Name (UPN) is the name of a user.