What would be PS commnad to delete a particular Email-Address from Contacts. The address to be deleted is not the primary address "External E-mail Address". Thanks

There is no single one liner cmdlet, you will have to script it using powershell. There are many examples if you search for powershell remove proxyaddresses.James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Hi, Per my knowledge, the task can’t be done by GUI. Please refer to the following article ‘PowerShell to remove secondary proxy email address’: http://powershell.com/cs/media/p/3966.aspx Thanks Sophia