attribute "HiddenFromAddressListsEnabled" not syncing to O365

Question

If the attribute HiddenFromAddressListsEnabled in office 365 its not synching One of the affected user.

Answer 1

Hello EAGLE_580,

First, may I double confirm if you are using AAD Connect Sync to sync AD users to Microsoft 365 Azure AD? If so, as far as I know the attribute you mentioned above is not synced by AAD Connect Sync by default. For your reference https://docs.microsoft.com/en-us/azure/active-directory/hybrid/reference-connect-sync-attributes-synchronized >> msExchHideFromAddressLists

If you want to sync this attribute to Microsoft 365 (Exchange Online), the option "Exchange Hybrid deployment" must be enabled in the AAD Connect Sync, you could go to your AAD Connect Sync server and view the existing configuration to check if it was enabled there. For your reference

After that please make sure you have set up the local AD user's attribute "msExchHiddenFromAddressLists" to True in your AD. And wait for the sync cycle or force a DirSync via AD powershell command Start-ADSyncSyncCycle -PolicyType Delta After that wait for some minutes and double check the result from Microsoft 365 side. By the way, if you found the attribute was not synced, please double check your AAD Connect Sync service manager with metaverse Search and then see if you could find the attribute there, thanks.

Please feel free to let me know if you got any further updates, thanks.

Best Regards,

Oliver

Answer 2

@Oliver

We're having this same issue, just discovered it today on one user. Doing some testing to see if it happens with other accounts. We use AD-Connect, and "Exchange Hybrid Deployment" is enabled. The account does show up in a metaverse search with the hidden from Exchange address list set correctly, but the change never makes it to Exchange Online. Do you know of anything else to try?

Thanks,

Jan

Answer 3

Hello EAGLE_580,

If you need any further help, welcome to share with me, thanks.

Best Regards,

Oliver