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How to Accept Meetings as CEO Without 'On Behalf Of' in Microsoft 365
Question details
The user needs an assistant or delegate to be able to accept or decline calendar meetings for an executive (such as a CEO) without the response displaying an 'on behalf of' label to recipients.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Managing executive calendars and responding to meeting invitations via a delegate account.
- Observed behavior
- By default, meeting responses sent by a calendar delegate clearly show the recipient that the message was sent 'on behalf of' the CEO.
Ensure you have Microsoft 365 administrator privileges, as modifying mailbox delegation and 'Send As' permissions requires access to the Microsoft 365 Admin Center.
Assign 'Send As' Permission in Microsoft 365 Admin Center
Granting 'Send As' permission allows a delegate to accept or decline meetings exactly as the mailbox owner, completely removing the 'on behalf of' label.
A standard delegate cannot normally accept a meeting without the action being associated with their own account. By elevating their access to 'Send As' permission, the delegate can act entirely as the mailbox owner.
Administrators must assign this permission in the Microsoft 365 admin center. Keep in mind that this behavior is currently governed by email sending permissions, so modifying it will affect regular emails as well.
Sign in to the Microsoft 365 Admin Center using an account with global or Exchange administrator privileges.
Navigate to 'Users' > 'Active users' in the left-hand menu. Find and click on the CEO or executive's mailbox account to open the properties pane.
Click on the 'Mail' tab in the user properties pane. Under the Mailbox permissions section, select 'Send as permissions'.
Click 'Add permissions', search for the assistant or delegate's account, select it, and click 'Save'. Allow a few hours for the server to sync the new permissions.
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Frequently Asked Questions
Can I remove 'on behalf of' just for calendar invites and not for regular emails?
Currently, Microsoft 365 does not offer a separate permission exclusively for calendar responses. To remove the 'on behalf of' label from meeting invites, you must grant full 'Send As' permission, which unfortunately applies to standard emails as well. Consider submitting this as product feedback to Microsoft if it does not meet your business requirements.
What is the difference between 'Send on behalf' and 'Send As'?
'Send on behalf' shows the recipient that an assistant or delegate sent the message for the executive. 'Send As' completely hides the assistant's involvement, making it appear to recipients as if the executive performed the action directly from their own account.
Where can I manage these mailbox delegation settings?
Mailbox delegation and permissions like 'Send As' can only be managed by an administrator. This is done via the Microsoft 365 Admin Center under the user's Mail properties, or through the Exchange Admin Center under Mailbox Delegation.
