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How can I find how or what is using a proxy address on my Exchange 2010?

Posted on 2015-01-22
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Last Modified: 2015-01-27
I made a black hole distribution group on my Exchange 2010 and when adding addresses it gives me the error: The proxy address "smtp:smith@whatever.com" is already being used by "Whatever.COM/EXEMPLOYEE/Sam Smith". Please choose another proxy address.
I have a single domain and Sam Smith does have that one address just as everyone has their own address (lastname@whatever.com. I have added other exemployee users without error but have a few like the one above that give me the error above. I'm still a bit green with Exchange so any help would be appreciated.
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Question by:24reasons
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Expert Comment

by:Seth Simmons
ID: 40564446
open active directory users and computers
right click on your domain and select find
in the find drop down list, change to custom search; click the advanced tab
in the ldap query field, type:

proxyaddresses=smtp:smith@whatever.com

click find now and it will show you the object that has that address
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Author Comment

by:24reasons
ID: 40564876
Seth,

That worked as it did find that user, I know where I put him but I was hoping that it would find another one so I could remove it from whatever user also had it. My goal is to add addresses to a black hole distribution list and when I do it errors out saying it's already being used. I can't remove it from the user as that is the only one he has, unless I'm just not understanding how to add people to a black hole distribution list. Any ideas?
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Expert Comment

by:Seth Simmons
ID: 40564910
objects that have a proxy address must be unique
what do you mean by black hole distribution list?  what are you trying to accomplish?
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Assisted Solution

by:24reasons
24reasons earned 0 total points
ID: 40564960
I have a number of ex-employees email accounts that I need to keep active. They continue to receive spam and other undesired mail. I'm reading that in order to combat that you create a distribution group that has no members and you add the ex-employees email address to that groups email addresses. Now when the ex receives new mail it gets sent to the group and since there's no members Exchange just deletes it instead of sending back a NDR. At least that's the way I understand it.
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Assisted Solution

by:Seth Simmons
Seth Simmons earned 500 total points
ID: 40565078
ahh ok
in that case, rename the smtp address for those - perhaps add a 1 at the end (smith1@whatever.com) or some other change
then you can use the actual smtp address for the distribution group and the mailbox itself will still be active but won't receive anything new in it
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Author Comment

by:24reasons
ID: 40565160
That was easy and it worked! Just one more thing if you don't mind. Is there a way to check and see if the emails are in fact going to that distribution group?
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Accepted Solution

by:
Seth Simmons earned 500 total points
ID: 40565222
since it's essentially a black hole, there is no evidence of a message though message tracking should show it coming in
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Author Comment

by:24reasons
ID: 40565237
Sounds logical. Thanks for the quick help.
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Author Closing Comment

by:24reasons
ID: 40572375
My goal was not stated in the question so the answer might not make sense with out it.
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