Distribution List email gets a Bounce Back Message

We have a DL email that is getting bounce back messages from internal when we try to send to the group.  This is a group that has been around since 2009 and has stopped working suddenly. Below is the email message:


Diagnostic information for administrators:

Generating server: EXCASHUB1.ad.local

IMCEAEX-_O=AD_OU=First+20Administrative+20Group_cn=Recipients_cn=Agilysys+20HSG+3F+3F+3FALLSUP@ad.local
#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##

Original message headers:

Received: from EXMBX2.ad.local ([fe80::600a:c07f:b289:b380]) by
 EXCASHUB1.ad.local ([fe80::843a:1f1f:44f3:e836%10]) with mapi id
 14.02.0318.004; Mon, 4 Feb 2013 18:10:56 -0500
Content-Type: application/ms-tnef; name="winmail.dat"
Content-Transfer-Encoding: binary
From: "White, Timothy" <Timothy.White@agilysys.com>
To: =?Windows-1252?Q?Agilysys_HSG=96ALLSUP?= <AgilysysHSGALLSUP@agilysys.com>
Subject: TEST
Thread-Topic: TEST
Thread-Index: Ac4DLOMV6h7jgR24TpeAnrmHQ2dghg==
Date: Mon, 4 Feb 2013 18:10:57 -0500
Message-ID: <87567826D7CAD24F9D014712F288DF94AAED08@EXMBX2.ad.local>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator: <87567826D7CAD24F9D014712F288DF94AAED08@EXMBX2.ad.local>
MIME-Version: 1.0
X-Originating-IP: [65.210.128.15]
Twhite0909Asked:
Who is Participating?
 
tjc123IT DirectorCommented:
I helped someone earlier with this same issue, try following the info in this link:

http://www.simple-talk.com/sysadmin/exchange/exchange-e-mail-addresses-and-the-outlook-address-cache/

Here is a link to the thread I helped the user I mentioned:

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_28019280.html
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Twhite0909Author Commented:
The issue was related to an invalid character on Alias within the list during last modification.  The solution was

1.disable DL email group
2. RUn SYncall on DC
3. Add new DL point to existing disabled account for DL email group
4. Add correct name for ALias
5. Finish wait for replication
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Twhite0909Author Commented:
I've requested that this question be closed as follows:

Accepted answer: 0 points for Twhite0909's comment #a38864443

for the following reason:

solution found by MS support
0
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