MEU Display Information Issue

Hi

 

We are in middle of User migration from Exchange 2003 to Exchange 2010, both exchanges server belong to two different forest but share the same recipient policy abc@labcat.com

 

Forest Labmice.com

User1 Domain Login ID = user1@labmice.com

Email Address                    =user1@labcat.com

 

Forest Labcat.com

User2 Domain Login ID  =user2@labcat.com

Email Address                    =user2@labcat.com

 

Hi

 

We are in middle of User migration from Exchange 2003 to Exchange 2010, both exchanges server belong to two different forest but share the same recipient policy abc@labcat.com

 

Forest Labmice.com

User1 Domain Login ID = user1@labmice.com

Email Address                    =user1@labcat.com

 

Forest Labcat.com

User2 Domain Login ID  =user2@labcat.com

Email Address                    =user2@labcat.com

 

Initially everything seems ok and GAL was properly sync between two exchanges.

 

We had created Labmice.com Users MEU on Labcat.com and vice versa, whenever Labmice.com User send email to Labcat.com User, Exchange first tries to find User within domain if not found then forward email to other domain using MEU SMTP address.  

 

Initially everything seems normal on test users and last week when we migrate one of our production user with mailbox we face abnormal behavior.  when User1 send email to User2, email address consider to be external rather treats as internal same in the case of User2 to User1.  When recipient click on sender email address it shows SMTP address rather showing MEU information I am unable to trace the issue what just happen was unexpected or might be some miss configuration.

 

Need support to fix this issue.