Updating the lync 2016 attendee
To learn how to perform common tasks in the Skype for Business/Lync client, see the Uni Com page.Also, see Microsoft's Skype for Business help pages or the Lync for Mac user guide.
A user can tell if the address book is completely downloaded when the “Address book synchronizing” status goes away when searching for a contact – as shown here: As been previously well documented, if you need to force the Lync client to download the address book immediately you can.
This issue has been around for awhile but can become more noticeable over time.
When a Lync 2013 user searches for a contact in the Search Contact box, the contact will show an incorrect Presence state.
In a nutshell there is an issue with the integration between the Lync 2013 client and Exchange which impacts the synchronization between the Lync 2013 client and the Outlook calendar information (such as “in a meeting”) and the Out-Of-Office status.
If your Lync 2013 client has the September 2013 update installed your Lync client version will be 15.0.4535.1002.
Even if you go to Outlook and manually accept the meeting, it will revert to tentative within seconds.