What permissions are needed for sync to function properly?
The Ektron Window Service requires the ability to read, write, and edit files as it's performing its operations.
For a standard sync set up, the Application Pool is set to have an identity of 'Network Service'. Meanwhile, the Ektron Window Service 4.0 service is using 'Local System'. Both 'Network Service' and 'System' full permissions should be applied to the 'Ektron' folder and site root folder for the site.
/Program Files (x86)/
If using a domain account for the Ektron Window Service, the account will need to have administrative rights to the server, as well as Log On as Service rights.
Add the Log on as a service right to an account
To add the "Log on as a service" right to an account on your local computer
Open Local Security Policy.
In the console tree, double-click Local Policies, and then click User Rights Assignments.
In the details pane, double-click Log on as a service.
Click Add User or Group, and then add the appropriate account to the list of accounts that possess the Log on as a service right.