Configure admin rights to access Exchange 2003 mailbox

You can expose the security page on Exchange Server through the registry modification called ShowSecurityPage as shown in Figure A.

Figure A: Exchange's Registry Editor displays the registry modification called ShowSecurityPage.
(Click on image for enlarged view.)

Once you add this under HKEY_CURRENT_USERSoftwareMicrosoftExchangeExadmin and then right-click on Properties in Exchange System Manager (ESM), you will see the screen shown in Figure B.

Figure B: Permissions for administrator rights can be found in ESM under Properties -> Security.
(Click on image for enlarged view.)

In Figure B, note that I do not have Deny ticked on the 'Send As' and 'Receive As' permissions for the administrative account.

Double check that your service account is a member of a group that has more restrictive rights as it relates to 'Send As' and 'Receive As' rights.

You'll also want to confirm that you typed in the appropriate port as well: port 389 or 390, depending on the implementation of the Active Directory Connector (ADC). You can use a Windows Support utility called LDP.EXE to attempt to connect to the target organization to see if you are getting similar errors.

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