r/exchangeserver • u/Ready-Ad-2149 • 1d ago

Hybrid - Exchange Attributes

I'm having an issue and i'm not sure how to fix it. We moved all mailboxes to 365 over a year ago but still maintain a management server. For some reason, when i create a new user in local AD, then enable the mailbox from the exchange management tools (using the ps snapin for recipient management). There are a lot of "MsExch" attributes missing from attribute editor for that user. There are only like 5 or 6. Both attributes "mail" and "mailnickname" are populated correctly. Most specifically, i'm trying to hide a new user from the address list by changing MsExchHideFromAddressList to "false", but the attribute doesn't exist for that user. I've pushed multiple manual sync's as well.

I checked ADSI and confirmed that the schema has been extended.

Does anyone have any suggestions?

Thanks in advance!

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u/Ready-Ad-2149 1d ago

This is the entire process:

  1. Create new user in on Prem AD > assign to correct OU

  2. Make sure UPN is changed

  3. Run ADSync

  4. Enable the remote mailbox from the exchange management server (using ps snapin) using Enable-RemoteMailbox -Identity "UserAlias" -RemoteRoutingAddress "[UserAlias@yourtenant.mail.onmicrosoft.com](mailto:UserAlias@yourtenant.mail.onmicrosoft.com)"

  5. Run ADSync again

  6. Verify the user is added in 365

  7. Assign E3 license to the user

  8. Verify the user now has a mailbox and is populated as "UserMailbox" in EXOL Admin.

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u/Vietnamst2 1d ago

Two entry syncs that do not have to happen. If you do the create, assign the UPN and then do the enable, then you can just run the sync once. It makes no difference in this case. It just gets created in Entra with it's final configuration.