Why wasn't a specific contact synced?

This can have a variety of reasons. You can find the exact reason in the sync log (Dashboard -> "Actions" column -> Download sync log).

In general, the following reasons are conceivable:

• The contact does not meet the minimum requirements of sync.blue®:
  • E-mail address or first name and last name ("People")
  • Company name ("Companies")  
• The target app has special requirements for a contact to be saved at all can be. e.g.
  • Placetel: Contacts must have at least one phone number.
  • weclapp: Contacts must have at least one last name.
• The contact in the source is of a contact type (e.g. "company") that Sync target not supported (see Compatibility list)   
• The contact has fields with invalid or unusually formatted fields (date of birth, e-mail address,...) and was therefore ignored.

If the reason is still unclear, please email us a screenshot of the source contact for more in-depth analysis.