Searching outlook emails by date

Hello,
I've been pulling my hair out trying to figure out howto search a specific folder in outlook.
I am able to select the folder by using this vba statement Set olStartFolder = olSession.PickFolder".

After executing the above command variable olStartFolder contains the name of the desired folder (without the full path.. example "TROO-returned emails", but when I use this command
Set olStartFolder = olSession.Folders("\\Mailbox - Order Online Support (Thomastech)\TROO-returned emails")
I receive a runtime error saying object couldn't be found.

Any idas?

Thanks in advance for your help.

Angelo