Content Comparison

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The "Mail" attribute in AD is not a technical field. It is the Email Address to be "published" in the directory. At Yale it is the PrimaryAliasName@yale.edu and that happens to be the O365 account of a two-mailbox user because we require O365 to be Primary if it exists.

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Any personal O365 mail account

User Object

field	values
MailNickName	PrimaryAliasName
TargetAddress	SMTP:PrimaryAliasName@yaledu.mail.onmicrosoft.com but it doesn't matter because when there is an O365 account the targetAddress is (ignored by Exchange Online)
ProxyAddresses	SMTP:PrimaryAliasName@yale.edu smtp: Netid@connect.yale.edu smtp: PrimaryAliasName@connect.yale.edu smtp: PrimaryAliasName@yaleedu.mail.onmicrosoft.com smtp: O365Aliases@yale.edu (repeat for all secondary aliases to the O365 account)

Primary Eliapps with no O365 mail

User Object

field	values
MailNickName	PrimaryAliasName
TargetAddress	SMTP:PrimaryMailbox
ProxyAddresses	SMTP:PrimaryAliasName@yale.edu smtp: EliappsAliases@yaleEliappsSecondaryAliases@yale.edu

Primary O365 with Eliapps Secondary

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(repeat for all secondary aliases of the Eliapps account )

Eliapps account of someone with an O365 mail account

Contact Object

field	values
MailNickName	GoogleAlias
TargetAddress	SMTP:GoogleAccount@bulldogs.yale.edu
ProxyAddresses	SMTP:GoogleAlias@yale.edu smtp: GoogleAliases@yaleGoogleSecondaryAliases@yale.edu (repeat)

Foreign Mail Alias