Yes, If you’re set up to ‘send on behalf of’ a group/shared mailbox then the reply time is attributed to the individual who replies to the message that was received by the group/shared mailbox. If you’re set up to ‘reply as’ then the reply time is attributed to the group/shared mailbox itself.

For best results, we recommend linking both individual and group/shared mailboxes to your account for the most in-depth reporting on email traffic volumes and reply times.