Outlook Read Receipt Default by Mailbox

Role-Based Access Control (RBAC) plays a crucial role in managing features available to users in Exchange Online. To control read receipts, administrators can assign user roles using RBAC policies set on user mailboxes. However, this does not prevent users from changing read receipt options through Outlook Web App (OWA) settings.

To block this happening, it is essential to remove the read receipt options from the GUI. One way to achieve this is by using RBAC to remove read receipt settings from OWA. Although administrators can update user mailbox settings to control read receipts, this does not prevent users from changing the read receipt options through OWA settings.

To find and update mailboxes with custom attributes, you can use a server-side filter in Exchange Online PowerShell. The following code snippet demonstrates how to do this:

```

$Mbx = Get-ExoMailbox -RecipientTypeDetails UserMailbox -ResultSize Unlimited -Filter

Set-MailboxMessageConfiguration -Identity $Mbx.Identity -ReadReceiptBehavior AlwaysSend

```

This code uses the CustomAttribute12 property to hold the value “RR” to indicate that a mailbox should be included in the set. For example, you can use this cmdlet to create a set of users who always send read receipts when requested.

There is also an Exchange Online PowerShell cmdlet to achieve this:

For instance, if you want a set of users to always send read receipts when requested, you can use the following command:

Figure 3: Read receipt options in OWA settings

By using these methods, administrators can effectively control read receipts and ensure that they are sent as intended.

Outlook read receipt default by mailbox