Please consider moving this question as-is (no need to recreate) to the proper forum for maximum visibility.  Questions written to the users' own "Discussions" space don't get the same amount of attention and can go unanswered for a long time. 

You can do so by selecting "Move" under ACTIONS along the upper-right.  Then search for and select: "SourceOne and EmailXtender".

You can use the Support Search function implemented in this website. Searching for 'guide' for the product 'SourceOne' made me found this:

https://support.emc.com/search?text=guide&product_id=7861&facetProductId=31757

Hi Team,

Here is the link for all SourceOne Email Management related documentation:

https://support.emc.com/products/433_SourceOne-Email-Management/Documentation/

For all documentation related to the SourceOne Modules, like Discovery Manager or Supervisor, go to this site and type in the product name, then click the Documentation link:

https://support.emc.com/products

Hope this helps!

Cheers,

Brad