Let's say you're going through your bugs and want to ask someone a question about one of them.  You can use Team System Web Access to send that person an email containing all of the work item's information and a link to it.

To email a work item, open the work item in TSWA.  Go to the Tools menu shown below and choose Send as Email.

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You'll get a new window where you can enter the person's full email address and type a message.  The message body contains a link to the work item in Team System Web Access and all of the work item's fields and contents.

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You can also email query results.  As with the work item above, go to the Tools menu and choose Send as Email.

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You'll then get a similar email window that contains the results of the query and a link so that the email recipient can run the same query.

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Enjoy!