Email Address Policies and Distribution Groups

Hi Guys!

I have a problem with “department” attribute for distribution groups.
There is some DGs with department = DEPT1

Also there is 2 EAP:
Priority 1 – Catch all recipients with department = DEPT1 and assign %m@DEPT1.com
Default – Catch all recipients and assign %m@default.com

If I manually apply (via ECP) EAP with priority 1 then all DGs with department = DEPT1 will get @DEPT1.com addresses as it should be, but if I change one of those DGs, for example display name, default policy will set %m@default.com address.

This occurs only with distribution groups, all users behave correctly.

I have Exchange 2010 SP3 RU6. AD Forest 2008 r2 with no migrations in past.

I will be appreciated for any advice.