Post by Paul C on Jul 13, 2012 9:44:50 GMT 5.5
This e-mail message cannot be delivered to (recipient name) because the e-mail address is no longer valid
ISSUE:We had a user go from Office 2003 to Office 2010. Whenever this person would address e-mails to certain people they would get that pesky mail tip that would say "This e-mail message cannot be delivered to (recipient name) because the e-mail address is no longer valid". This message would appear even when they would be selecting a recipient out of the GAL. Another Outlook 2010 user could address a message to the same user out of the GAL and not receive the message.
Deleted/recreated the user's mail profile, could not duplicate the issue in OWA, ran a repair on the Office installation, etc.
FIX:
To resolve this issue we had to delete the user's nickname cache. In earlier versions of Outlook the nickname cache would reside within the user's profile as an .nk2 file on the machine they were using Outlook on (%appdata%\Microsoft\Roaming\Outlook\) Now, in Office 2010 the nickname cache is stored as part of the mailbox on the Exchange server. To delete the cache have the user do the following in Outlook: Click File, Click Options, Click Mail, scroll down to the Send messsages section. Click the button that says Empty Auto-Complete List. Click Yes on the message that asks if you are sure you want to empty the auto-complete list. Click OK on the Outlook Options window, exit Outlook, then re-launch the application.
The user should now be able to select from the GAL and not receive the invalid e-mail address message, unless in fact, the e-mail address is truly invalid. Yes, it's true their drop-down list when addressing messages is gone and will need "rebuilt" but they shouldn't be using that as an "address book" anyway - if you need the e-mail address in the future add it to your contacts in Outlook - easier said than done, right?
Summary:
Microsoft Outlook maintains a nickname list that is used by both the automatic name checking and the automatic completion features. The nickname list is automatically generated as you use Outlook. If the nickname cache is corrupted, Outlook may not be able to identify recipients, may offer incorrect recipients when automatically completing the e-mail address, or may send the message to the wrong person.
Unlike earlier versions of Outlook that store the nickname cache in a file on your hard drive, Outlook 2010 stores the nickname cache in your primary message store. For example, if you are using a Microsoft Exchange Server account, your nickname cache is stored in a hidden message in your mailbox.
More Information:
How to remove nickname cache entries, one at a time
Outlook 2010
1.Open a new email message.
2.Type the first few characters of the nickname cache entry that you want to remove from the cache.
3.When the entry appears in the "suggested names" list, move your mouse pointer over the name until it becomes highlighted. (But do not click the name).
4.When the “X” icon appears next to the highlighted name, click X to remove the name from the list.
Outlook 2007 or Outlook 2003
1.Open a new email message.
2.Type the first few characters of the nickname cache entry that you want to remove from the cache.
3.When the entry appears in the "suggested names" list, use the UP and DOWN arrow keys on your keyboard to select the entry, and then press DELETE on your keyboard.
How to clear the whole nickname cache
To have us clear the whole nickname cache for you, go to the "Fix it for me" section. If you prefer to fix this problem yourself, go to the "Let me fix it myself" section.
MSI file attached
Or do it manually as below:
Let me fix it myself
Outlook 2010
Use one of the following methods to reset the whole Outlook nickname cache for Microsoft Outlook 2010.
Method 11.With Outlook 2010 open, click File (BackStage), and then click Options.
2.Click the Mail tab.
3.Under Send Messages, click Empty Auto-Complete List.
Outlook will generate a new nickname cache.
Method 21.Click Start, and then click Run.
2.Start Outlook by using the /CleanAutoCompleteCache switch.
For example: Outlook.exe /CleanAutoCompleteCache
Note If Outlook is not installed in the default location, you must point to the path of Outlook.exe.
Outlook will generate a new nickname cache.
Outlook 2002 through Outlook 2007
Windows 7 or Windows Vista: Use the following steps to reset the whole Outlook nickname cache.
1.Exit Outlook.
2.Click Start, and then click Computer.
3.Click Organize, and then click Folder and search options.
4.On the View tab, click to enable the Show hidden files, folders, and drives option.
5.Click OK.
6.On the Start menu, click All Programs, click Accessories, and then click Run.
7.In the Run dialog box, type the following command (including the quotation marks), and then click OK:
“C:\ Users\UserName\AppData\Roaming\Microsoft\Outlook”
NoteUsername in this path is the name of the currently logged on Windows user.8.Right-click the .NK2 file that has name of the profile that you want to reset, and then click Rename.
9.Rename the file as profilename.bak, and then press ENTER.
10.Start Outlook.
Windows XP: Use the following steps to reset the whole Outlook nickname cache.
1.Quit Outlook.
2.Click Start, and then click Search.
3.In the Search Companion left-side panel, click All files or folders.
4.In the All or part of the file name: box, type *.NK2.
5.In the Look In box, click to select your local hard disk.
6.Click More advanced options, click to select Search hidden files and folders check box.
7.Click Search.
8.Right-click the .NK2 file with the name of the profile that you want to reset, and then click Rename.
9.Rename the file to profilename.bak, and then press ENTER.
10.Quit Windows Explorer.
11.Restart Outlook.
Outlook will generate a new nickname cache.
Use the steps in the following section to reset the Outlook nickname cache for both Microsoft Windows 2000 and Microsoft Windows Millennium Edition (Me).
1.Quit Outlook.
2.Start Windows Explorer.
3.On the Tools menu, click Folder Options, and then click the View tab.
4.Under Advanced Settings, click to select the Show hidden files and folders check box.
5.Click OK.
6.Click Start, point to Search, and then click For Files or Folders.
7.In the Search for Files and Folders box, type *.NK2 in the Search for files or folders named box.
8.In the Look In box, click to select your local hard disk.
9.Click Search Now.
10.Right-click the .NK2 file with the name of the profile that you want to reset, and then click Rename.
11.Rename the file to profilename.bak, and then press ENTER.
12.Quit Windows Explorer.
13.Restart Outlook.
Outlook will generate a new nickname cache.
Use the steps in the following section to reset the Outlook nickname cache for both Microsoft Windows NT 4.0 and Microsoft Windows 98:
1.Quit Outlook.
2.Start Windows Explorer.
3.On the Tools menu, click Folder Options, and then click the View tab.
4.Under Advanced Settings, click to select the Show all files check box.
5.Click OK.
6.Click Start, point to Search, and then click For Files or Folders.
7.In the Named box, type *.NK2.
8.In the Look In box, click to select your local hard disk.
9.Click Find Now.
10.Right-click the .NK2 file with the name of the profile that you want to reset, and then click Rename.
11.Rename the file to profilename.bak, and then press ENTER.
12.Quit Windows Explorer.
13.Restart Outlook.
Outlook will generate a new nickname cache.
support.microsoft.com/kb/287623
ISSUE:We had a user go from Office 2003 to Office 2010. Whenever this person would address e-mails to certain people they would get that pesky mail tip that would say "This e-mail message cannot be delivered to (recipient name) because the e-mail address is no longer valid". This message would appear even when they would be selecting a recipient out of the GAL. Another Outlook 2010 user could address a message to the same user out of the GAL and not receive the message.
Deleted/recreated the user's mail profile, could not duplicate the issue in OWA, ran a repair on the Office installation, etc.
FIX:
To resolve this issue we had to delete the user's nickname cache. In earlier versions of Outlook the nickname cache would reside within the user's profile as an .nk2 file on the machine they were using Outlook on (%appdata%\Microsoft\Roaming\Outlook\) Now, in Office 2010 the nickname cache is stored as part of the mailbox on the Exchange server. To delete the cache have the user do the following in Outlook: Click File, Click Options, Click Mail, scroll down to the Send messsages section. Click the button that says Empty Auto-Complete List. Click Yes on the message that asks if you are sure you want to empty the auto-complete list. Click OK on the Outlook Options window, exit Outlook, then re-launch the application.
The user should now be able to select from the GAL and not receive the invalid e-mail address message, unless in fact, the e-mail address is truly invalid. Yes, it's true their drop-down list when addressing messages is gone and will need "rebuilt" but they shouldn't be using that as an "address book" anyway - if you need the e-mail address in the future add it to your contacts in Outlook - easier said than done, right?
Summary:
Microsoft Outlook maintains a nickname list that is used by both the automatic name checking and the automatic completion features. The nickname list is automatically generated as you use Outlook. If the nickname cache is corrupted, Outlook may not be able to identify recipients, may offer incorrect recipients when automatically completing the e-mail address, or may send the message to the wrong person.
Unlike earlier versions of Outlook that store the nickname cache in a file on your hard drive, Outlook 2010 stores the nickname cache in your primary message store. For example, if you are using a Microsoft Exchange Server account, your nickname cache is stored in a hidden message in your mailbox.
More Information:
How to remove nickname cache entries, one at a time
Outlook 2010
1.Open a new email message.
2.Type the first few characters of the nickname cache entry that you want to remove from the cache.
3.When the entry appears in the "suggested names" list, move your mouse pointer over the name until it becomes highlighted. (But do not click the name).
4.When the “X” icon appears next to the highlighted name, click X to remove the name from the list.
Outlook 2007 or Outlook 2003
1.Open a new email message.
2.Type the first few characters of the nickname cache entry that you want to remove from the cache.
3.When the entry appears in the "suggested names" list, use the UP and DOWN arrow keys on your keyboard to select the entry, and then press DELETE on your keyboard.
How to clear the whole nickname cache
To have us clear the whole nickname cache for you, go to the "Fix it for me" section. If you prefer to fix this problem yourself, go to the "Let me fix it myself" section.
MSI file attached
Or do it manually as below:
Let me fix it myself
Outlook 2010
Use one of the following methods to reset the whole Outlook nickname cache for Microsoft Outlook 2010.
Method 11.With Outlook 2010 open, click File (BackStage), and then click Options.
2.Click the Mail tab.
3.Under Send Messages, click Empty Auto-Complete List.
Outlook will generate a new nickname cache.
Method 21.Click Start, and then click Run.
2.Start Outlook by using the /CleanAutoCompleteCache switch.
For example: Outlook.exe /CleanAutoCompleteCache
Note If Outlook is not installed in the default location, you must point to the path of Outlook.exe.
Outlook will generate a new nickname cache.
Outlook 2002 through Outlook 2007
Windows 7 or Windows Vista: Use the following steps to reset the whole Outlook nickname cache.
1.Exit Outlook.
2.Click Start, and then click Computer.
3.Click Organize, and then click Folder and search options.
4.On the View tab, click to enable the Show hidden files, folders, and drives option.
5.Click OK.
6.On the Start menu, click All Programs, click Accessories, and then click Run.
7.In the Run dialog box, type the following command (including the quotation marks), and then click OK:
“C:\ Users\UserName\AppData\Roaming\Microsoft\Outlook”
NoteUsername in this path is the name of the currently logged on Windows user.8.Right-click the .NK2 file that has name of the profile that you want to reset, and then click Rename.
9.Rename the file as profilename.bak, and then press ENTER.
10.Start Outlook.
Windows XP: Use the following steps to reset the whole Outlook nickname cache.
1.Quit Outlook.
2.Click Start, and then click Search.
3.In the Search Companion left-side panel, click All files or folders.
4.In the All or part of the file name: box, type *.NK2.
5.In the Look In box, click to select your local hard disk.
6.Click More advanced options, click to select Search hidden files and folders check box.
7.Click Search.
8.Right-click the .NK2 file with the name of the profile that you want to reset, and then click Rename.
9.Rename the file to profilename.bak, and then press ENTER.
10.Quit Windows Explorer.
11.Restart Outlook.
Outlook will generate a new nickname cache.
Use the steps in the following section to reset the Outlook nickname cache for both Microsoft Windows 2000 and Microsoft Windows Millennium Edition (Me).
1.Quit Outlook.
2.Start Windows Explorer.
3.On the Tools menu, click Folder Options, and then click the View tab.
4.Under Advanced Settings, click to select the Show hidden files and folders check box.
5.Click OK.
6.Click Start, point to Search, and then click For Files or Folders.
7.In the Search for Files and Folders box, type *.NK2 in the Search for files or folders named box.
8.In the Look In box, click to select your local hard disk.
9.Click Search Now.
10.Right-click the .NK2 file with the name of the profile that you want to reset, and then click Rename.
11.Rename the file to profilename.bak, and then press ENTER.
12.Quit Windows Explorer.
13.Restart Outlook.
Outlook will generate a new nickname cache.
Use the steps in the following section to reset the Outlook nickname cache for both Microsoft Windows NT 4.0 and Microsoft Windows 98:
1.Quit Outlook.
2.Start Windows Explorer.
3.On the Tools menu, click Folder Options, and then click the View tab.
4.Under Advanced Settings, click to select the Show all files check box.
5.Click OK.
6.Click Start, point to Search, and then click For Files or Folders.
7.In the Named box, type *.NK2.
8.In the Look In box, click to select your local hard disk.
9.Click Find Now.
10.Right-click the .NK2 file with the name of the profile that you want to reset, and then click Rename.
11.Rename the file to profilename.bak, and then press ENTER.
12.Quit Windows Explorer.
13.Restart Outlook.
Outlook will generate a new nickname cache.
support.microsoft.com/kb/287623
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