MOERA address not created (Resolved)

Hi c_small,

the Microsoft Online Email Routing Address (MOERA) is automatically generated and included in the proxyAddresses attribute within Microsoft Entra ID, a process commonly referred to as proxy calculation.

Key aspects of MOERA creation include:

• The MOERA is formed from the user's userPrincipalName prefix, combined with the initial domain suffix.
• The proxyAddresses attribute in Active Directory is a multi-value property containing various known address entries.
• During synchronization to Microsoft Entra ID, values from the on-premises Active Directory's mail or proxyAddresses attribute are copied to a shadow mail or proxyAddresses attribute in Microsoft Entra ID.
• Subsequently, internal rules within Microsoft Entra ID are applied to calculate the final proxyAddresses for the object.

If certain users do not have a MOERA address, various factors could be causing the issue.
Consider checking this:

• Ensure correct settings for mail, mailNickName, and proxyAddresses attributes in your on-premises Active Directory.
• Verify the uniqueness of the userPrincipalName among all security principal objects in the directory forest.
• Confirm domain verification in Microsoft Entra ID.

How the proxyAddresses attribute is populated in Microsoft Entra ID - Active Directory | Microsoft Learn

Microsoft Entra UserPrincipalName population - Microsoft Entra ID | Microsoft Learn