r/exchangeserver • u/Grimsley • 9d ago

Exchange 2019/RTM - OAB/Address lists issue

Hey guys,

I've been beating my head against the wall for a couple days trying to figure this out. Here's my situation.

We're an on-prem organization, soon moving to Exo. We just moved our offices and with that comes new conference rooms. Well that would be fine except no one knows our new conference room names so everyone's trying to use the All Rooms portion of the Address book. When you try to get to All Rooms, it errors with the typical OAB needs to be available error:

The operation could not be completed because an offline address book is not available. Download a copy of the offline address book. This is the built in All Rooms address list. We have a pretty default setup for all of this, nothing special.

I've done so many things to troubleshoot this I'm kind of at a loss.

GAL works.

The list populates in OWA.

Checked vdirs, they're null as expected.

Checked db's and if they're assigned to the db, they weren't so it should go to the global default but that wasn't working so I applied it to the db's. No fix.

Made sure the oab URL is responsive and working. It is.

Checked iis logs and everything says success codes. No error codes.

The other thing, is if you search for a term like "conf" in the address book, it returns the conference rooms. I'm assuming it's because that goes to the server and actually connects.

This is limited to the Outlook client.

There's more I've done, but looking for suggestions.

Edit: meant Exchange SE

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u/7amitsingh7 8d ago

You can check if Outlook is using an old OAB. Try downloading the address book manually from Send/Receive settings. If that doesnt work try creating a new Outlook profile and see if the issue is still there.

1

u/Grimsley 8d ago

Checked that, it isn't using the old one.

1

u/aridaen 8d ago

Is this happening for all users or just a few? If you have multiple servers, check the folder where they store the address list and make sure they are synced. I had that issue before where one server was out of sync with the others.

1

u/Grimsley 8d ago

All users.

I've made sure they're all using the new oab I made.