We have setup Active Directory forest trust and we used FIM2010 R2 for GALSync. All the contacts have been created in the two forest. from one forest I can pick the contact from the address book and send an email without problems, but from the otherside I try the same but the emails are bouncing. 

On the bouncing emails, I can see that the originating domain is added automatically to the contact, I don'know where it comes from. this how the error message is generated:

Generating server: MBX.sendingdomain.local (Sending Server)
IMCEAEX-_o=Sendingdomain_ou=Exchange+20Administrative+20Group+20+28FYDIBOHF23SPDLT+29_cn=Recipients_cn=4fa2eac26060455ba1247480dde343d7-test+user1@sendingdomain.com
Remote Server returned '550 5.2.0 RESOLVER.ADR.BadPrimary; recipient primary SMTP address is missing or invalid'
Original message headers:
Here the Sendingdomian is where the email is originating from not the destination domain.
The email address of the recipient is test.user1@receivingdomain.com but I dont understand in error message why it put the originating domain instead of the destination domain.
Looking at the contact properties of I can see only this line in the email tab
SMTP:test.user1@receivingdomain.com
The exchange trust is between Exchange 2010 and Exchange 2013.
I don't know if someone else has seen this.

 

Hello

check on wrong site contact for x500 address and try one "wrong" contact: get-mailcontact | set-mailcontact and get-offlineaddressbook | update-offlineaddressbook , download on clientthe new offline addessbook and try send again email
if not help delete on client cached email address

Did not help, I can see warnings on the synchronized contacs that they are read only

Hello

and if add modified to fim acc not help?

sorry I did not get that. could it an issue with X500 missing in the contacts email address.

Hello

if create contact before install FIM need add modify permission for fim acc to contacts.
or if not use contact only one or two user need delete from outlook cache and from AD and FIM create again contact but need backup contact  group member and all attribute like legacyDN and after fim create again contact need copy legacyDN to x500 for new contact

One more question, does FIM 2010 r2 SP1 Support GALSync between Exchange 2010 and Exchange 2013 ? The version of FIM I am using is 4.1.3637.0

I managed to get things running by unistalling everything on FIM server and re-installing. Thanks