All Notification Server error codes -214 are error codes right out of winerror.h and can be determined by converting to a hex.How to Convert the -214 error to Heximal:
Using these steps, we get the following for each of your status:
Push Initiation Status(-2147023108); - (0x800706FC) "The trust relationship between the primary domain and the trusted domain failed."
Searching through a search, Microsoft, or other technical Web sites for the error codes can also provide crucial information.
For a complete list of Winerror.h errors and associated -214 error code and descriptions, you can go to Microsoft Knowledge Base Article 186063.