Overall, just across all the Mimecast pieces that we use, it's somewhat of a mess when you want to figure out where you need to go to make a change. The interface isn't the best. How everything works on the back end is confusing.

There are no missing features to speak of.

The price of the solution is expensive. It can improve by reducing the price. 

The differentiation between bulk spam mail and campaign-related mail could be improved. Campaign-related activities are challenging to find in Mimecast Mailbox Continuity. For example, in an organization with a hundred people working for you, there will be approximately 100 email IDs. As a sender, if I want to spoof some people in the organization and hack their credentials, I need to identify targets for the phishing campaign. So I could use an email address to spoof a Microsoft page or create a fake page impersonating Microsoft to harvest credentials. By sending a hundred people a hundred emails with the same subject and same sender, with the same URL, this will easily be detected. So the second option is to spoof the sender every time by sending a hundred people a hundred URLs with similar subjects. In the second scenario, Mimecast Mailbox Continuity is not very good at detecting it.

Technical support has been slower than it was in the past, likely due to the pandemic.

The interface and the documentation could be improved. They can also include some more training resources and content like video. While setting things up, I had to search for the information quite a bit. It took me time to find the correct way to do something. The information is there, but it is sort of all over the place. They can create a better help knowledge base or help portal. 

It retains your email for 45 days. They can maybe increase this duration.

I don't think it's ideally suited for maybe a smaller business environment, like, for example, for companies with less than 100 seats. They do have SMB packages, but I think from a complexity standpoint, it's better suited to medium to larger enterprises.