Blocking of email system when statements opened
Hi,we are using Hosted 2016 and we are having trouble when our customers open their statements.
Customers are getting blocked from opening, or if they can open, then they can't close the email without the attached alert.
This is not something we have had a problem with in the past, and has only been happening for a week or so(that we are aware of).
Is this a possible virus attachment or genuine microsoft alert?