Outlook name cache not updating
This functionality change can be helpful for troubleshooting auto-complete. If the auto-complete feature isn't working, the first thing I recommend is to check that it's enabled. When the Outlook Options screen appears, select the Mail option and then scroll down to the Send Messages section.
Outlook provides a Use Auto-complete List to Suggest Names checkbox, which should be selected (Figure 1).
When changes occur within the main Global Address Book (GAL) on the Exchange server, computers running Outlook 2007, 2010, and 2013 may not automatically receive the updates.
If this is happening, then you may notice missing, non-existent and/or incorrect entries.
The nickname list is generated automatically as you use Outlook.
If the nickname cache is corrupted, Outlook may be unable to identify recipients, may offer incorrect recipients when automatically completing the email address, or may send the message to the wrong person.
Please visit the document on How to turn on or off Cached Exchange Mode for (Outlook 2007, Outlook 2010, and Outlook 2013).
Outlook 2011 does not use Exchange Cached mode and directly connects to the Global Address Book (GAL) via LDAP connection.
NK2 file, it's stored as part of the mailbox and replicated to Outlook.
One of the main reasons why Microsoft chose to do this was because it wanted to provide auto-complete functionality to Outlook Web App (Figure 2).
Fortunately, Microsoft caved in on the new Office Ribbon, so our old friend Mr.