User profile cannot be loaded with Event ID 1509: DETAIL - The filename or extension is too long

This article provides resolutions to fix the error "User Profile Service failed the logon. User profile cannot be loaded".

Applies to:   Windows 10 - all editions
Original KB number:   2536571

Symptoms

Some clients log on with temporary profile with error "User Profile Service failed the logon. User profile cannot be loaded". Event ID 1509 can be found in the application Event Log. The detail of the event ID 1509 is something like below:

Log Name: Application
Source: Microsoft-Windows-User Profiles Service
Date: <DateTime>
Event ID: 1509
Task Category: None
Level: Warning
Computer: mycomputer.CONTOSO.com
Description:
Windows cannot copy file
\\fileserver1.contoso.com\share\profiles\studentacct111.V2\AppData\Local\Microsoft\Windows\Temporary Internet Files\Low\Content.IE5ELSJ1AXB=,cm-9416518_1285174050,
66b6f8276f22fbe
,Miscellaneous,;;dc=s;cmw=owl;env=ifr;ord1=982256;sz=160x600;contx=Miscellaneous;btg=;ord=[timestamp][1] to location C:\Users\studentacct111.CONTOSO\AppData\Local\Microsoft\Windows\Temporary Internet Files\Low\Content.IE5\ELSJ1AXB=,cm-9416518_1285174050,
66b6f8276f22fbe
,Miscellaneous,;;dc=s;cmw=owl;env=ifr;ord1=982256;sz=160x600;contx=Miscellaneous;btg=;ord=[timestamp][1]. This error may be caused by network problems or insufficient security rights.

DETAIL - The filename or extension is too long.

Cause

This can happen if the destination path of the user's profile is on a server with a long name and share folder name. For example, \\servername\thisistheprofileshare. As the file is stored locally on c:\users\username, the filename for copying to the destination will increase when this prefix is changed to \\servername\thisistheprofileshare\ leading to a pathname longer than the supported 260 chars.

Resolution

Use one of the following methods to resolve the issue:

1. You can use the "Empty Temporary Internet Files folder when browser is closed" option in Internet Explorer to delete all cached Internet files when a user quits Internet Explorer. This option doesn't delete cookie information. Cookie information (which is usually small) is copied when the profile is saved. To use this option, follow these steps:

   1. In Internet Explorer, click Internet Options on the View (or Tools) menu.

   2. Click the Advanced tab.

   3. Under Security, click the Delete saved pages when browser closed or Empty Temporary Internet Files folder when browser is closed check box to select it.

   4. Click OK.

2. Enable the Group Policy Setting for "Delete cached copies of roaming profiles", located under in the following location:

   Computer Configuration\Administrative Templates\System\User Profiles