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mail Read receipt received from Disabled user

Posted on 2016-08-18
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Last Modified: 2016-09-06
Hi All,

  I disabled active directory for one user since 5 months, I sent an email to one user in my Exchange  and received read receipt from the disabled user, there was a mailbox forward from  this user to the disabled one, I need to know how that can happen, how can I receive the read receipt from a disabled Account.
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Question by:ITMaster1979
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by:Adam Brown
Adam Brown earned 1000 total points (awarded by participants)
ID: 41761098
Disabling a user account in AD doesn't make their mailbox inaccessible. It just prevents that user from being able to log in to use the mailbox. Any user who has permission to open the mailbox for that user can still do so, read messages, and generate a read receipt. Run get-mailboxpermission on the disabled user's mailbox to see which people have access to that mailbox.
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by:ITMaster1979
ID: 41761108
I did and only Exchange admin, any luck that the user is still accessing it?
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by:FOX
FOX earned 1000 total points (awarded by participants)
ID: 41761175
Disable all the mailbox features for this account  example
OWA,Activesync, Imap, etc.
also Mail Flow Settings> Mail Delivery restrictions....accept messages from only the following senders
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Adam Brown earned 1000 total points (awarded by participants)
ID: 41761183
If the user's account is disabled, they can't get into the mailbox. You'll also want to check to see if the permissions set for the Exchange Admin have automapping enabled. You would basically log in to the exchange admin mailbox profile in outlook, and if it also loads the mailbox of the disabled user, then automapping is enabled. You have to remove the permissions and add them back with -automapping $false appended to the add-mailboxpermission string to fix that.

If the disabled user somehow got ahold of the Exchange admin creds, though, yeah, they can still access the mailbox. Run get-mailboxstatistics <disabled mailbox> | fl and look through that data to see the last time the mailbox was opened and how, if you like.

Realistically, though, if someone is set to forward messages to that mailbox or if the mailbox is configure to forward to someone else, it's possible the forward action triggered the read receipt you got.
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by:Adam Brown
ID: 41785793
No response from user. Answers should resolve or explain the issue.
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