Hello all! so I created a new distribution group in exchage 2007 and added the users for this group so far so good, also added them on the security setting and assign full rights to the group of users. here's the problem some of the users get a NDR error when trying to send from this email group on there outlook 2007. anny suggestion, this is a mail enable group and so far four out of the six user are able the other one's are not able to send on behalf of that email. thanks. GFX_03

Few things….. Could you share the NDR please? Also let us know how did you assign the permission? Did you use outlook delegate feature or powershell etc..? Meanwhile take a look at below thread please.... http://social.technet.microsoft.com/Forums/en-US/exchangesvrgeneral/thread/72b54918-3216-47fe-9edb-dce3ccc0bbf1/ Regards, Pushkal MishrA

Hello thanks for the reponse, all users where setup the same way and two out of the six are working. heres the error from exchange. Delivery has failed to these recipients or distribution lists: XXXXXXXXXXX You are not allowed to send this message because you are trying to send on behalf of another sender without permission to do so. Please verify that you are sending on behalf of the correct sender, or ask your system administrator to help you get the required permission. Diagnostic information for administrators: Generating server: /O=FIRST ORGANIZATION/OU=EXCHANGE ADMINISTRATIVE GROUP (FYDIBOHF23SPDLT)/CN=RECIPIENTS/CN=XXXXXX #MSEXCH:MSExchangeIS:/DC=local/DC=elc:ELC-SERVER[578:0x000004DC:0x0000001D] #EX# All the users where setup at the same time and yes I did look at the link you stated prior to creating this in exchange. Permission where assing from the ADUCM, and where granted full permissions on all users. you lost me when you say if I give the permissions from outlook this is a distribution list please explain, thanks. GFX-03

If some users are working and the others arent, then try to create a new Outlook profile and test. Delete the N2k cache/autocomplete from Outlook and try. If using cache mode, try using online mode and test. Sukh

If possible try to re-add everything again, wait for the replication and then test & see that makes any difference...Regards, Pushkal MishrA

Hi GFX_03, Any updates? Please also check the Effective Permissions for the member of group as below blog said. Send As Permissions for a Mail-Enabled Security Group http://cbfive.com/blog/post/Send-As-Permissions-for-a-Mail-Enabled-Security-Group.aspx Frank Wang Forum Support Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

Thanks for the ones that responded, recreating the profile for outlook on the user that was not working resolve the issue. Frank Wang: thanks for the suggestion, but have follow I similar way to accomplish this also give them full permission under the security tap. Thanks, GFX_03