Not without creating custom activities as Workflows don't support showing the guids. This is a bit sad since the guids are usefull for assembling urls directly pointing to different objects in CRM, for instance pointing to an opportunity from a link in an
email.
I usually create workflow activities to convert an EntityReference (CRM 2011) to a GUID. Rather simple code but it is still a hassel since you cannot make a generic Input argument that accepts any entity (at least not in CRM 4.0). Hence you need one workflow
activity per entity. If you want to use the guid in a url in an email, you will also need to create an activity that creates a link since this will otherwise not be possible.
Hope it helps!
Gustaf Westerlund, CEO and Chief Architect at
CRM-Konsulterna in Sweden
Blog:
http://gustafwesterlund.blogspot.com
Swedish Dyn CRM Forum:
http://www.crmforum.se
