how do I resolve "user isn't assigned to any management roles" error in Exchange 2010 EMC?

@Richard, chances are a different user account was used for the schema preparations during the pre-install tasks as to those that were used to install Exchange.

Ensure your account is a member of the Organization Management group, and see if the error is resolved for you.

Thanks!

I found the solution, courtesy of David Strome at Microsoft.

http://gaionlinekb.blogspot.com/2009/11/emc-rbac-authorization-returns-access.html

When our Exchange 2010 server was installed we used a particular domain account.

For administration we use different User accounts.

Each user that will be administering the exchange server must be a member of "Organization Management" this is all you should need to ensure the user is a member of.

I wanted to claify this as the simplest fix also posted by David George

cheers