windows service

Hi,
I have a windows service that does some distributed transcationacross 2 servers.
One DB is SQL 2005 express and the other is SQL 2005.My question is I have created a domain user account and I am logging the service in as that account. Then I am adding permission tothe user acccount to both DB's.
If I use integrated security in my connection strings to the DB's will they login as the domain user account andeverything be greart????
rotsey

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