https://www.infopathdev.com:443/forums/41.aspxIf you're not sure where to ask your question, ask it here. If necessary, our moderators will make sure it gets classified in the correct board.enCommunityServer 2007 SP3 (Build: 31118.962)https://www.infopathdev.com:443/forums/thread/84383.aspxTue, 13 Nov 2012 16:54:25 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:84383ErnestoM0https://www.infopathdev.com:443/forums/thread/84383.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=41&PostID=84383<p>It sounds like you need a custom Active Directory web service that uses an LDAP connection string to query your company&#39;s active directory, and return a result that indicates whether the email address is already assigned to another person.</p><p>I don&#39;t know of anything in InfoPath or SharePoint that allows this. It would probably be a custom-made web service.</p>https://www.infopathdev.com:443/forums/thread/84367.aspxTue, 13 Nov 2012 07:57:04 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:84367Tinker0https://www.infopathdev.com:443/forums/thread/84367.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=41&PostID=84367Have a Employee form where the persons (new) company email address gets created in a separate textbox (EmailAddress) captured from the &quot;FirstName&quot; textbox and &quot;LastName&quot; textbox with the: concat(EmpFirstName; &quot;.&quot;; EmpLastName) e.g. john.doe@contoso.com How can I check (towards exchange) if this email address can be used to the new employee and isn’t already assigned to another person?