Global address list not updating exchange 2016 cached mode
If you receive an error message then you can investigate further (Note: Set your Outlook client to send you a delivery report on the test email as well). Make sure the OAB you are looking at, has been updated from the GAL. If using Outlook, query the GAL directly, or download the latest OAB. Before you do anything send the user you created a ‘Test Email’ from your own account.In this guide, the relevant timings are explained and instructions are given in how you can directly force an update and resync, which can be very handy when troubleshooting or when you work in an Exchange environment which sees a lot of user mailbox mutations.This means that in the worst possible scenario, an update to the Address Book won’t become available to the user until 48 hours after the change.
24/02/13If you create a new user, give them a mailbox, and they seemingly fail to appear then don’t panic! The easiest way to do this is simply connect to Outlook Web Access, and query the GAL directly (OWA uses the GAL no the OAB like Outlook running in cached mode does). The User/Mailbox IS listed on the Server But NOT in Outlook.
Now, if you are like most organisations then outlook will be operating in cached mode.
So log in to OWA and test if you can see the new users there.
When a user in Outlook was NOT in cached mode and they went into the Global Address List to select users to send an email to they would see accounts of people who have not got a mailbox attached to them, were not mail enabled and did not even have an email address associated to them.
These accounts why greyed out in comparison to the normal accounts.