@morrow without logs this will be hard to track down. can you ask your administrator to open up a support case for this?
Various Zarafa training courses are available for our partners and system administrator of customers. Our extensive training courses describe a wide variety of Zarafa functionality and keep you up-to-date with the latest improvements and features.
There are different technical training courses for both novice and expert users. During the training courses different handson exercises are done to ensure maximum knowledge transfer. At the end of the training courses a certification exam can be joined to become certified.
At the Zarafa Certified Engineer training passing the exam in combination with a valid LPIC-1 or RHCSA certification will make you a "Zarafa Certified Engineer". More information about the LPIC-1 certification is here available. Preparation trainings for the LPIC-1 certification are available on the LPI Approved Training partner portal.
Next to our technical training courses, we offer on-site end-user training courses to get familiar with the Zarafa specific features. Please contact sales for a custom-made training for your organization.