Forwarded Outlook Message adds OWA Redirect to URL links

Hi, I have an odd one for the Experts.

In a Corporate Exchange environment, I have two users who have access to a shared mailbox. Emails from a third person are sent to this mailbox to be disseminated to a mailing list under the name of the shared box, and this task is handled by either of the two users.

On SOME occassions, the email arrives with the URL link pointing to our OWA environment, rather than to the actual website.  Like noted in related questions, the OWA URL is being prefixed onto the actual URL.

This is what is being sent: :

This is what is being received:

The emails are NOT being sent from OWA; they are being sent from the shared mailbox from within the user's own profile -- they have SendAs rights.  

Any ideas on why this is happening and how to stop it?  We are sending to external users as well as fellow employees and this is not good marketing.

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what is the link all about?

In this example
If --> is the CAS server
below the CAS server (Default Web Site) you got any other application?

Normally on the CAS server we dont have any other application, reason OWA depends\controlls the iis-requests to owaauth.dll
JLNewmarkAuthor Commented: is a completely external URL for WebEx, a web conferencing service we use.  It is not on a server over which we have any control over and is not part of our environment.

What is happening is that randomly, this -- "" is being appended to the beginning of that URL, redirecting the non-mycorp webex participant to our OWA logon page.

I'm sorry if it wasn't clear.  Does this help?
what is the exchange version in questions e2k7 or E2010?
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should be the OWA URL

Is the place at question.
-->> what is this redir.aspx?

Are you using any ADDINS to add\insert the links?
The affected messages should be an HTML messages correct??
Did we get these links copy\pasted from any other locations? web-pages.??

E2k3 reference for redir.asp
Exchange 2003 OWA and URL redirection

JLNewmarkAuthor Commented:
We have Exchange 2010, and these particular users are on Outlook 2007.  Our OWA environment is 2010, but I have to reiterate, these users are NOT using OWA.  They are working entirely in Outlook.

The original links are put into the email by (as I understand it) direct copy & paste from the webex website.  The original email's links are good.  And SOMETIMES, the email forwarded to the group is just fine too -- and SOMETIMES, it turns into the mess you see above.  The users are unable to distinguish any difference between mailings (content, origin, procedure) where the hyperlinks are untouched and mailings that have these OWA redirected links.

I have looked into the OWA & URL redirection information -- but as I said, my users are on Outlook and not using OWA for any part of this mailing.  I thought I had it, too, when I found that info, but it's not what they are doing.
JLNewmarkAuthor Commented:
Hi, Microsoft came back to me to tell me that the problem is not in Outlook or Exchange at all -- apparently it has something to do with the Web-Ex links themselves.  I will find out more details and post them before I close.

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JLNewmarkAuthor Commented:
Forgive me, I have been unable to find out the details of exactly why Web-Ex does this to some links.  The users went to Web-Ex without me in the loop to resolve the issue.
JLNewmarkAuthor Commented:
Turns out not be something that can be resolved at the end-user or Outlook level; accepting this as the resolution because it's the best answer I've got at the moment.
Sorry this was closed, as we are having almost the exact same issue - and webex is not a part of the problem at all.  OWA does this to ANY link included in a message.  It is very annoying. You don't even have to paste the link - you can type the link, and it will still be changed. Would love to see this re-opened.  You should be able to replicate the issue. We are on Exchange 2010.

This behavior is not limited to forwarded messages - but also happens in new messages that include links...whether they are pasted or typed.
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