Google Postini Directory Sync Configuration Guide - Manual (Page 15)

Microsoft Active Directory 15
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6. In Step 2 of the configuration and enabling process, make sure the name of
your Active Directory domain is correct and click Add to DSML Configuration
File Now.
7. Click Close on the DSML Services Configuration dialog box to finish.
The configuration and enabling process is completed. You are now ready to test
for DSML setup.