I've run into a bit of a snag while working with address lists in Microsoft Exchange Online (EXO). It seems that when you create an address list, the members don't automatically get added unless you "tickle" their mailboxes. This process is fine for cloud-only accounts, but we're mostly dealing with users whose mailboxes are synced from on-premise Active Directory (AD). Unfortunately, EXO doesn't allow me to update custom attributes for these users since we don't have Exchange on-premise. I need to know what attribute I can modify in on-premise AD that would trigger EXO to update the mailbox user. Ideally, it should be something that's seldom used. Alternatively, is there another way to approach this problem? It's pretty frustrating!
4 Answers
When we first moved to M365 with AD sync, I had to manage this too. I might actually still have the script I used lying around. Let me see if I can find it!
You can find a list of attributes that get synced through Microsoft Entra Connect. The "Company" attribute might work for you if it’s not already used, as it can be a safe bet for a change.
If you head into AD, enable advanced features, and check the properties of a user, you should find advanced settings where custom attributes are listed. Back when I worked at my last company, I pushed user birthdays into Office 365 using one of those attributes, but I can’t recall exactly which one right now.
Does anyone even use the pager field these days? Just throwing it out there!
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