6. Proxy generation

On Exchange 2003, with proxy generation logging (Diagnostics Logging > MSExchangeSA > Proxy Generation) turned up you will see an event 3006:

Event Type: Information
Event Source: MSExchangeSA
Event Category: Proxy Generation
Event ID: 3006
Description:
Policy provider instance processing recipient.
Recipient DN: CN=e2kuser7,CN=Users,DC=bilong,DC=test
Current recipient proxies:
X500:/O=Microsoft/OU=Site1/cn=Recipients/cn=e2kuser7
smtp:e2kuser7@secondary.com
CCMAIL:e2kuser7 at Site1
MS:MICROSOFT/SITE1/E2KUSER7
SMTP:e2kuser7@Site1.Microsoft.com
X400:c=US;a= ;p=Microsoft;o=Site1;s=e2kuser7;
Applicable policies:
CN=Default Policy,CN=Recipient Policies,CN=Microsoft,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=bilong,DC=test
CN=Site1,CN=Recipient Policies,CN=Microsoft,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=bilong,DC=test
Chosen policy: CN=Site1,CN=Recipient Policies,CN=Microsoft,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=bilong,DC=test
Proxies of chosen policy:
smtp:@secondary.com
X400:c=US;a= ;p=Microsoft;o=Site1;
SMTP:@Site1.Microsoft.com
MS:MICROSOFT/SITE1
CCMAIL: at Site1
Proxies in change list:
Proxies to generate:
Conflicts during generation:
Proxies generated:
Proxies written to recipient:

This event will give you more insight as to the decisions made in the proxy generation step, as well as a nice summary of the applicable policies. This can save you the work of reading through the 8130 events.