I am an trying to create new distribution groups with owners and members from FIM portal and later manage the group in AD. I have two management agents FIMMA and ADMA. For the attributes like member, owner etc I have set equal precedence in the sync engine. While I am trying to define rule extension in order to make both import and export work, for the attributes like member, I am getting error: "Defining a rule extension import attribute flow to a metaverse reference attribute is not allowed". Is there any way to avoid this?  

Hello,

no this is a known Limitation, you can not handle reference attributes in rules Extension.
And I dont know why you want to use them in your Scenario.

Simple create direct flows in both MAs for Import and Export should do want you need.
With "equal precedence" you already configured modifying member and owner will work.

/Peter