I have Skype for Business Server 2019 in a 3-node front end pool. One of our users is not getting his presence updated from his Outlook calendar. When he schedules a meeting, his Skype for Business presence is still saying "Available". I have tried having him create a new meeting and check back after 30 minutes in case it was the default delay, but his presence is still showing "Available" during the meeting time.
Where should I look to troubleshoot and correct this?