Exchange 2003/2007 Recipient Policy Problem

Exchange 5.5
Microsoft Exchange 2003
Microsoft Exchange 2007
Recipient Policies
After introducing Exchange 2007 into our 2003 environment we discovered one of our recipient policies was a problem b/c it was created in Exchange 5.5. The recommended solution from MS was to recreate the policy in Exchange 2003 which we did. This created a problem. Once we did what MS said we noticed the default policy (Lowest) was now being applied to everyone. For us this means every user gets 1000 domains added to them. Our desire is to only have the highest recipient policy that has "" as the only applied policy. Our structure is pretty basic. If you are in our top level OU you get the highest priority policy (the one with only one domain). The other policy is the default policy. We strictly use the default policy as a place to tell Exchange that we accept mail for our 1000 domains. The MS level 1 guy is struggling with this and asking for more money.

Answer Wiki

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In Exchange Server 2003, Recipient Policies are used to tell Exchange which domains to accept inbound email for, and also to generate email addresses for users. An LDAP filter is used to filter users to generate email addresses for.

In Exchange Server 2007, this functionality is separated into the following:

  • Accepted Domains: These tell Exchange which domains to accept email for
  • Email Address Policies: These tell Exchange to generate email addresses

Accepted Domains can be of three types:

  1. Authoritative: Exchange is authoritative for this domain (will generate NDRs if recipients not found/resolved), and has or knows where the recipients are
  2. Internal Relay: This is for address space sharing scenarios. Exchange may or may not have recipients, and shares the address space with other (typically non-Exchange) mail systems. Recipients not found locally are delivered to the other mail system using a Send Connector.
  3. External Relay: Exchange acts as a relay. It does not have any recipients for this domain – it simply accepts inbound mail and forwards it to a particular external mail system.

Depending on what you want to do with email for these domains, you can create Accepted Domains of the appropriate type.

When upgrading/migrating from Exchange Server 2000/2003 to Exchange Server 2007, you need to upgrade the Recipient Policy/Email Address Policy.
Address List and EAP filter upgrades with Exchange Server 2007

More details:
Managing Accepted Domains

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