The service account is the user account under which the Telephony service runs.
Membership in the local Administrators group, or equivalent, is the minimum required to complete this procedure. Review details about using the appropriate accounts and group memberships at http://go.microsoft.com/fwlink/?LinkId=83477.
|To change the Telephony service logon account|
In the console tree, click the server you want to manage.
On the Action menu, click Properties.
On the Setup tab, in Account Information, click Choose User.
In the Select User dialog box, click Locations, and then click the domain where the account is located.
In Enter the object name to select, type the name of the account, and then click OK.
If the user's domain is not listed in the Locations dialog box, try specifying the domain in Enter the object name to select by using the following format: