- Continuity of product. I'd lose customers if they (for example) focus on Cloud and neglect on-premise products. I think Kerio was trying to head that way anyway, but GFI could accelerate it.
- Conversion of customers to direct sales.
- Changes to ordering process. I have automated systems dependent on Kerio's web site; changes will cause difficulty for me.
- Changes to support: access, charges, response time.
No one knows whats going to happen at this point and I think speculating on it will not get anything accomplished except fear and worry.
If it turns out that this is actually what happens then I choose to vote with my wallet and will turn to another vendor with a competing product that fills the gap. There are a number of them out there so moving from one to the other is not a huge issue, but can be a pain for customers and getting up to speed on other products. Hey thats life. Unless your a Microsoft or Google, products and companies in the SMB markets get bought, purchased, and shuttered all the time.
Its just simply a fact of life at this point.