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Exchange 2k7 mailboxes are not receiving group emails

Posted on 2011-03-22
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Last Modified: 2012-08-13
I have recently installed Exchange 2007 into an existing Exchange 2003 environment.  Both applications are being supported on a native Windows Server 2008 environment. The Exchange environment is configured as the following:
two front-end servers, 2 CAS servers, and 4 mailbox servers.

A small group of IT staff has been moved over to one 2k7 mailbox. These accounts are having an intermittent issue with sending emails to distribution lists. Sometimes the messages are sent to the group, and other times the users in the group do not receive the message. The message log does not show any messages being sent when they don't receive them.

I have run a clean profile on their outlook, made sure they deleted the group from contacts, and the NDK file.  I also made sure they were using the GAL and not a local contact. The distribution group is set as a global group.

2k7 users never receive NDR's and I don't see any errors on the server. The emails just seem to drop. People in the 2k3 environment are not experiencing this issue.

Does anyone know of why this is happening, and what could be the resolution.
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Question by:jahhan
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LVL 31

Expert Comment

by:MegaNuk3
ID: 35192312
Change the DL expansion server to be an E2k7 server
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Author Comment

by:jahhan
ID: 35192436
I made that change and here are the results.

Changed DL Expansion to 1st CAS server and was able to receive 2 out of 5 emails.
Changed to the 2nd CAS server and was able to receive 3 out of 5 emails.
Change to a Exchange 2k3 server and 5 out of 5 emails were received.
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LVL 31

Expert Comment

by:MegaNuk3
ID: 35194976
The DL should be a universal group, this is how all DLs created in E2k7/e2k10 are.
Convert it to a Universal group then make E2k7 the expansion server and all emails should be received.
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Author Comment

by:jahhan
ID: 35207770
At the present moment the AD team is hesitant to changing groups from global to universal.  Is there no other alternative (such as keeping the groups as global and updating all the existing groups to point to a specific expansion server)?  
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Accepted Solution

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MegaNuk3 earned 500 total points
ID: 35209369
In E2k7 and E2k10 you CANNOT create a distribution group as anything other than UNIVERSAL

So tell your AD team to change it otherwise setting the Expansion server to a version that is going to be decommissioned is a bad idea and a manual task for lots of DLs

Or maybe modify the expansion server in e2k7 EMC / EMS and see if the group gets converted to universal or not.
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Author Comment

by:jahhan
ID: 35210932
Click the wrong button.  Full points should be awarded to ID 35209369
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LVL 31

Expert Comment

by:MegaNuk3
ID: 35211077
thanks for the points
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