Calendar Problems

Fix Exchange Room Calendar Remaining Tentative with AutoAccept

John Wilson Oct 1, 2026 869 views

Question details

The user is experiencing an issue where an Exchange room calendar retains a tentative status for new meetings even though the AutomateProcessing setting is configured to AutoAccept.

Fix Exchange Room Calendar Remaining Tentative Despite AutoAccept

Product: Microsoft Exchange
Device & OS: not provided
Scenario: Configuring automatic meeting acceptance for a resource or room mailbox in an Exchange environment.
Observed behavior: New meeting requests remain in a tentative state instead of being automatically accepted, with PowerShell showing TentativePendingApproval and AddNewRequestsTentatively set to True.

Before you start

Ensure you have administrative access to the Exchange Management Shell (PowerShell), as modifying calendar processing policies requires elevated Exchange administrator permissions.

Solution 1Recommended

Update Calendar Processing Settings via Exchange PowerShell

Adjust specific flags in the calendar processing configuration that override the standard AutoAccept behavior.

Setting a mailbox to AutoAccept is not always sufficient if conflicting flags are enabled. The attributes TentativePendingApproval and AddNewRequestsTentatively will force the calendar to place requests in a tentative state until manually approved.

Launch Exchange Management Shell

Open the Exchange Management Shell on your server or connect to Exchange Online PowerShell as an administrator.

Review Current Settings

Run the command 'Get-CalendarProcessing -Identity "Your Room Name"' to review the current configuration and verify that TentativePendingApproval and AddNewRequestsTentatively are set to True.

Apply New Configuration

Execute the command 'Set-CalendarProcessing -Identity "Your Room Name" -TentativePendingApproval $false -AddNewRequestsTentatively $false' to disable the tentative overrides.

Update Calendar Processing Settings via Exchange PowerShell

Configuration Applied: It may take a few minutes for the new settings to propagate. Once applied, new meeting requests will automatically be accepted without staying tentative.

Solution 2

Review Resource Delegates and Organizational Policies

Identify if resource delegates are intercepting requests or if higher-level policies are enforcing tentative states.

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Frequently Asked Questions

Why does AutomateProcessing set to AutoAccept not guarantee automatic acceptance?

AutoAccept is just one part of the calendar configuration. Other parameters like TentativePendingApproval, AddNewRequestsTentatively, or hidden resource delegates can override this primary setting, forcing meetings to stay tentative until an action is taken.

How do I check if my Exchange room has resource delegates assigned?

You can use the Exchange Management Shell and run the command 'Get-CalendarProcessing -Identity "Room Name" | Format-List ResourceDelegates'. If this returns user names, those individuals must manually approve the meeting requests.

Can a regular user change the Calendar Processing settings for a room mailbox?

No, modifying room mailbox configurations using the Set-CalendarProcessing cmdlet requires elevated Exchange administrator privileges. Regular users experiencing this issue must contact their IT department.

Will changing these PowerShell settings affect previously tentative meetings?

No, updating the calendar processing policies only applies to new meeting requests sent after the changes have been saved and propagated. Existing tentative meetings will still need to be accepted manually.

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