Sometimes tracking down the exchange mailbox which is linked to a specific email address can be time consuming, but you you make this task easier by using the Exchange Management Shell. To do this, follow the below instructions:
1) Open the Exchange Management Shell
2) Enter the below code, but swap email@domain.com for the email address you are looking for:
Get-Recipient email@domain.com
If no results are found, then no records or feedback will be shown in the shell. If records are present, it will return the results similar to the below:
Name RecipientType
—- ————-
Username UserMailbox