000034128 - RSA Archer Offline Access Sync Status sticks on "Restart Sync"

RSA Archer Offline Access Sync Status sticks on "Restart Sync".  
The REST API call failed and sync did not complete.  Sync status does not get updated.
The following errors may occur:

<Message>The remote server returned an error: (500) Internal Server Error.</Message>
<Description>The validation message not found. The message key is WebApi:WebApiRemoteServerError</Description>
<Message>Unable to login with specified credentials</Message>

The following snippets are from the Archer Offline log files:

<E2ETraceEvent xmlns="http://schemas.microsoft.com/2004/06/E2ETraceEvent">
    <ApplicationData>
        <TraceData>
            <DataItem>
                <TraceRecord Severity="Error" xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord">
                    <TraceIdentifier>Archer.NET</TraceIdentifier>
                    <Description>The remote server returned an error: (500) Internal Server Error.</Description>
                    <AppDomain>Archer.Offline.Tools.Controller.exe</AppDomain>
                    <Exception>
                        <ExceptionType>System.Net.WebException, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType>
                        <Message>The remote server returned an error: (500) Internal Server Error.</Message>
                        <Source>System</Source>
                        <StackTrace>
   at System.Net.WebClient.UploadDataInternal(Uri address, String method, Byte[] data, WebRequest&amp; request)
   at System.Net.WebClient.UploadString(Uri address, String method, String data)
   at Archer.Offline.WebApi.OfflineSyncController.&lt;&gt;c__DisplayClass2.&lt;BuildOfflineSyncDownload&gt;b__1()
   at Archer.Offline.WebApi.ApiUtility.ExecuteApiMethod[T](Func`1 method)
                        </StackTrace>
                    </Exception>
                </TraceRecord>
            </DataItem>
        </TraceData>
    </ApplicationData>
</E2ETraceEvent>
<E2ETraceEvent xmlns="http://schemas.microsoft.com/2004/06/E2ETraceEvent">
    <ApplicationData>
        <TraceData>
            <DataItem>
                <TraceRecord Severity="Error" xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord">
                    <TraceIdentifier>Archer.NET</TraceIdentifier>
                    <Description>The validation message not found. The message key is WebApi:WebApiRemoteServerError</Description>
                    <AppDomain>Archer.Offline.Tools.Controller.exe</AppDomain>
                </TraceRecord>
            </DataItem>
        </TraceData>
    </ApplicationData>
</E2ETraceEvent>
<E2ETraceEvent xmlns="http://schemas.microsoft.com/2004/06/E2ETraceEvent">
    <ApplicationData>
        <TraceData>
            <DataItem>
                <TraceRecord Severity="Error" xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord">
                    <TraceIdentifier>Archer.NET</TraceIdentifier>
                    <Description>Unable to login with specified credentials</Description>
                    <AppDomain>Archer.Offline.Tools.Controller.exe</AppDomain>
                    <Exception>
                        <ExceptionType>System.Exception, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType>
                        <Message>Unable to login with specified credentials</Message>
                        <Source>ArcherTech.Utility</Source>
                        <StackTrace>
   at ArcherTech.Utility.AccessControl.SessionContextAdministrator.CreateSession(String instanceName, String userName, String password, String userDomain)
   at ArcherTech.Utility.AccessControl.SessionContextAdministrator.GetSessionContext(String instanceName, String userName, GetPassword getPasswordDelegate, String userDomain)
   at Archer.Offline.Kernel.Managers.SecurityManager.GetOfflineServiceAccountSession()</StackTrace>
                    </Exception>
                </TraceRecord>
            </DataItem>
        </TraceData>
    </ApplicationData>
</E2ETraceEvent>

1. Open Microsoft IIS Manager
2. Select the RSA Archer Site
3. Select the API application
4. Select Authentication
5. Ensure that "Anonymous Authentication" is the only Authentication method enabled
6. Right-click "Anonymous Authentication" and select "Edit"
7. Select Specific user and set "IUSR" and click "Ok"
8. Right-click on the API application and select "Edit Permissions"
9. Select "Security" tab
10. Locate "IIS_IUSRS" and ensure it has "Full Control"