dankitchen Previous troubleshooting article I have previously provided in scope of previous replies also includes a section for presence troubleshooting. The main difference is that relies on Rest endpoint:
Troubleshoot Microsoft Teams and Exchange Server interaction issues - Microsoft Teams | Microsoft Docs
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Issue 3: The Teams presence status is stuck on Out of Office or doesn't display 'In a meeting' when the user is attending an Outlook calendar meeting
A user whose mailbox is hosted on an on-premises Exchange server turned off the Outlook client automatic replies but the Teams presence status displays 'Out of Office' to all Teams clients from the same organization. This may last a few days.
A user is attending an Outlook calendar meeting but the Teams presence status doesn't update to 'In a meeting'.
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