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What populates the email nickname for a user in Azure AD. The user is synced via Azure Active Directory. We do not use exchange and have never utilized it. I can not see that attribute in AD. I want correct the spelling of the nickname but was curious where it gets populated in the first place.
This article explains how the mail, mailnickname, primarySMTPaddress and UserPrincipalName values are calculated when syncing from on-premises AD: https://learn.microsoft.com/en-US/troubleshoot/azure/active-directory/proxyaddresses-attribute-populate
Looks like my email address was incorrect at some point. I have updated the nickname in Azure AD.
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Not sure if you still need help with this. But, you wouldn't see MailNickname in Active Directory. From my understanding, its only for Azure Entra (Formerly Azure AD) ID's. You can look at it as Microsoft Entra's (Azure AD) version of your on prem Active Directory ProxyAddresses. While they both are used as email identifiers, since you're synchronizing users from your Active Directory environment, you wouldn't have to worry about the mail nickname. Unless you're creating the user in PowerShell with the New-AzUser cmdlet. Then you would need to use it.