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If you already have the Microsoft Office SharePoint Server (MOSS) Single Sign-on (SSO) Service running in your environment, you may skip the section immediately below and move on to "Steps to Configure a SSO Application for Confluence". However, you may want to review the steps to ensure your existing configuration will be compatible regarding domain accounts and general access/permissions.
Note: These steps come directly from the Microsoft TechNet documentation (see link for "Start the Single Sign-on Service" below).
This account should be the same account used for the SharePoint application pool associated to the SharePoint site that will be using the Single Sign-on Service. The account must be associated to the dbcreator and securityadmin SQL Server roles on the SQL Server that will be used to host the SSO database. See Dave Wollerman's SharePoint Blog.
Note: These steps come directly from the Microsoft TechNet documentation (see Manage Settings for Single Sign-on).
Please log in as the account used in step 3 of the "Steps to Configure the MOSS SSO Service" above. This account will be used to create the SSO database.
Note: This user will require SQL Server role assignments for dbcreator and securityadmin to be able to create the SSO database.
SharePoint Farm
Here are some additional considerations for configuring the SSO service in a SharePoint web farm.
At this point you should have a running instance of the Microsoft SharePoint Single Sign On service. This includes a new database for securely storing SSO user credentials. The next step is to configure a SSO application for Confluence. Please see Steps to Configure a SSO Application for Confluence.
Please proceed to SharePoint Feature Configuration to enable SSO functionality.