The readiness check fails due to the reason that the built-in security group IIS_IUSRS does not have the required user right ‘Logon as a batch job’. This requirement check was added to TFS 2015.2 after several reported problems with TFS web site when this permission was missing.
To resolve this, go ahead and grant the specified permission to the group IIS_IUSRS.
1. Navigate to the local security policy [Control Panel> Administrative Tools> Local Security Policy.]
2. Add the IIS_IUSRS group to log on as a batch job under Windows user right assignment, [Security Settings/Local Policies/User Rights Assignments].
Hope this helps!
Content: Sinduja Karruppiah
Review: Vimal Thiagaraj