Outlook favorites disappear

If your favourites in MS Outlook keeps disappearing you can try resetting the Navigation Pane.

Simply close MS Outlook, the run Outlook with /resetnavpane switch.
Start > Run > OUTLOOK.EXE /resetnavpane

This will clear and regenerate the Navigation Pane.

"Enable Third Party Browser Extensions" grayed out in IE

If none of your third party browser extensions (toolbars, etc) work open Internet Explorer > Tools > Internet Options > Advanced and check "Enable Third Party Browser Extensions".
If this option is grayed out it probably means this setting is managed by group policy. To enable it permanently you obviously need to change group policy
Computer Configuration\Administrative Templates\Windows Components\Internet Explorer\Internet Control Panel\Advanced Page\Allow third-party browser extensions

However if you only want to enable this temporally on a single computer or don't have ability to change GP settings you can do it via a simple registry change (must to have local admin rights to perform this):

Start > Run > regedit
Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Internet Explorer\Main > Enable Browser Extensions change to yes

If you need to do more often, create a text file with with following text, rename it to extensions.reg and save on your desktop.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Internet Explorer\Main]
"Enable Browser Extensions"="yes"

Whenever you need to enable extensions simply run the extenstions.reg file.

Whichever registry method you use after a restart settings may get changed back by the group policy.

Outlook NDR "None of your e-mail accounts could send to this recipient."

Your message did not reach some or all of the intended recipients.

      Subject:    Test
      Sent: 08/08/2011 10:00

The following recipient(s) cannot be reached:

      This email address is being protected from spambots. You need JavaScript enabled to view it.' on 08/08/2011 10:00
              None of your e-mail accounts could send to this recipient.


This error often occurs when user tries to send an email after copying recipient address from a hyperlink (or clicks on an email hyperlink). Although address may appear normal in Outlook, actual copied address includes mail-to: prefix. This sets Email Type to Mail-To instead of SMTP which Outlook fails to send. On top of that, this invalid address is saved to Outlook Auto Complete list and is resolved every time user tries to send an email to this recipient.

To check Mail Type, double click on recipient email address in TO field and check Email Type (in Outlook 2010, additionally, you will need to click on More Options > Outlook Properties)

To fix this click on Internet Type button to change Email Type to SMTP.
Alternately delete incorrect entry from Auto Complete list (start typing email address, select incorrect entry and press DELETE). Then type full email manually or copy as a plain text from notepad or similar.

Outlook 2003
Outlook 2007
Outlook 2010

Recall a message in MS Outlook

If you sent a message to someone by mistake or you forgot to add or attach something you can try recalling the message.
Outlook Message Recall feature only works if both sender and recipient are using Outlook and their mailboxes are hosted on Microsoft Exchange Server.

Recall a message in MS Outlook 2003

Mailbox > Sent Items > [your message] (double click to open) > Actions > Recall this message

Recall a message in MS Outlook 2007

Mailbox > Sent Items > [your message] (double click to open) > Other Actions > Recall this Message

Recall a message in MS Outlook 2010

Mailbox  > Sent Items > [your message] (double click to open) > Actions > Recall This Message

You will be informed by email whether recall succeeded or failed.

Recall will succeed if recipient has not read the message yet.
Recall will fail if message has been read, moved from the Inbox to another folder, or if recipient is not using MS Outlook.

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