Disable or remove mailbox?

I have an employee that has quit but I would like to receive email sent to his mail account.  I forwarded the mail to him to another mailbox on the server through the Exchange EMC.  I also disabled his AD account but it appears he is still receiving email on his phone.  How can I disable his AD account but still receive email on his existing mailbox but make sure he cannot access it?
NytroZAsked:
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Will SzymkowskiSenior Solution ArchitectCommented:
When you disable the Active Directory account with an associated mailbox mail will continue to flow to the mailbox regardless. How is the user getting mail to his Phone OWA or Active Sync? You can disable these features in the EMC as well under the mailbox properties for that specific user. Just go into properties and then features tab, you can disable services like active sync etc. If the account is disabled in active directory they will not be able to use OWA because it requires authentication.

Will.

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NytroZAuthor Commented:
How is the phone still receiving Mai if the account is disabled?  Doesn't it need to logon to the domain when you set up the account?
Will SzymkowskiSenior Solution ArchitectCommented:
That is correct, so not sure how they are getting mail. I was also giving an alternative to disable the features like active sync. Simply disabling the account should not allow access to owa and Active sync.

Will
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Hendrik WieseInformation Security ManagerCommented:
You have one of 2 options here.

Option 1 (Preferred)
1.1 Change his password in AD
1.2 Remote wipe and then block his device using Exchange Control Panel

Option 2
2.1 This would be to just simply change his password in AD which will prohibit him from downloading mails as authentication is required.
michaelalphiCommented:
Hi torszula,
You can check out the below article link which provides step by step process to disable existing user's account in AD :
http://tinyurl.com/p7dp7at
diperspCommented:
When we disable a user (Or change their password and don't want them getting back in), we also disable ActiveSync for that user's account.  That stops the phone dead at that point.  IF you want to wipe the phone, do that first.
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