Finding who owns an address in MS Exchange

We can find what entity has the selected email address assigned to it as follows:

• Open the Acive Directory Users and Computers Management Console
• Right Click on the domain > Select Find
• Select Custom Search in the Find field
• Select the Advanced tab
• To find the entity with the email address user@domain.co.uk for example, enter the following in the LDAP query field:
(proxyAddresses=smtp:user@domain.co.uk)
• This will list the entity containing the email address entered.