The funny thing is that an encryption key that is valid in CRM 2013 isn’t valid in CRM 2015 and later. It seems that Microsoft has changed the requirement of the encryption key sometime after the lauch of CRM 2013. So what are the requirements of the encryption key. I started looking for it and it isn’t all that clear, however this blog: http://blog.cobalt.net/blog/microsoft-crm-data-encryption-key-%E2%80%93-one-time-you-can-just-make-sh-up say the following: ”T
Hope this helps someone.
Developer at CRM-Konsulterna