We have 3 different exchnage forests (ExchA, ExchB, ExchC). Each forest have their own mail server. We had implemented IIFP so that any mailbox exist in every exchange forest will appear at others. IIFP run just fine.Many staff at ExchC complained that the unable to send email to staff at ExchA. staff at ExchA able to send an email to staff ExchC without problem.As i checked on ExchA GAL, staff's contact from ExchC created by IIFP has 3 entries for X500.From Exch C Server /o=ExchB/ou=First Administrative Group/cn=Recipients/cn=Suriya /O=ExchA/OU=HQ/cn=Recipients/cn=suriya From ExchA Server /o=ExchB/ou=First Administrative Group/cn=Recipients/cn=AGYUSUF /O=ExchA/OU=/cn=Recipients/cn=AGYUSUF /o=ExchC/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=AGYUSUF Diagnostic information for administrators: Generating server: KUL-MX-002.ExchC.dir IMCEAEX-_O=NT5_ou=8076956f58dba2478eac9dfcd940eecb_cn=ebdcd77ceead814f86996f62a8e4ae17@exchC.com.my #550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ## Original message headers: Received: from KUL-MX-005.ExchC.dir ([fe80::c46c:3fec:78f4:3893]) by KUL-MX-002.ExchC.dir ([::1]) with mapi; Mon, 1 Mar 2010 17:15:14 +0800 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: binary From: SCP Support <scpsupport@exchC.com.my> To: Yusri Bidin <IMCEAEX-_O=NT5_ou=8076956f58dba2478eac9dfcd940eecb_cn=ebdcd77ceead814f86996f62a8e4ae17@exchC.com.my> Date: Mon, 1 Mar 2010 17:19:12 +0800 Subject: This is test mail Thread-Topic: This is test mail Thread-Index: Acq5IEHZelFrD/AmSrqhaNjC06vQUA== Message-ID: <653D9F59550D5C49BBC244F5CEE2EE7E55BB0EEC54@KUL-MX-005.ExchC.dir> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: <653D9F59550D5C49BBC244F5CEE2EE7E55BB0EEC54@KUL-MX-005.ExchC.dir> MIME-Version: 1.0

On Tue, 2 Mar 2010 03:27:36 +0000, Suriya25 wrote:>>>We have 3 different exchnage forests (ExchA, ExchB, ExchC). Each forest have their own mail server. We had implemented IIFP so that any mailbox exist in every exchange forest will appear at others. IIFP run just fine.Many staff at ExchC complained that the unable to send email to staff at ExchA. staff at ExchA able to send an email to staff ExchC without problem.As i checked on ExchA GAL, staff's contact from ExchC created by IIFP has 3 entries for X500.From Exch C Server /o=ExchB/ou=First Administrative Group/cn=Recipients/cn=Suriya >/O=ExchA/OU=HQ/cn=Recipients/cn=suriya>>From ExchA Server /o=ExchB/ou=First Administrative Group/cn=Recipients/cn=AGYUSUF >/O=ExchA/OU=/cn=Recipients/cn=AGYUSUF >/o=ExchC/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=AGYUSUFDiagnostic information for administrators: >>Generating server: KUL-MX-002.ExchC.dir >>IMCEAEX-_O=NT5_ou=8076956f58dba2478eac9dfcd940eecb_cn=ebdcd77ceead814f86996f62a8e4ae17@exchC.com.my >#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ## Are the clients using an OAB? Are there errors in the OAB generationon the machine responsible for the OABGen in ExchC?The "/O=NT5" in the address usually points to a missing parentcontainer problem in the legacyExchangeDNs.http://blogs.msdn.com/dgoldman/archive/2005/11/18/OAB-PDN-Changes-and-Exchange-Site-Consolidations.aspx---Rich MatheisenMCSE+I, Exchange MVP--- Rich Matheisen MCSE+I, Exchange MVP