There are many different ways one could write an email delivering “bad news” to employees. Some key elements of such an email are that it should: 1) address the employees, 2) notify them of the problem, 3) explain what is being done to fix the problem, 4) say by when the problem is expected to be fixed, 5) inform them what they should do in the meantime, and 6) thank them for their understanding. Of course, you can include more specific details if you wish. Here is an example of a possible email for this situation, but you should feel free to use your own words:
We are writing to inform you that we are unfortunately having some problems with the Internet connection and are experiencing some downtime.
We understand that an Internet connection is essential to much of the work we do and our IT department is currently working hard to repair the issue. We hope to have everything working properly again as soon as possible.
We will keep you updated as we work to fix this problem. In the meantime, if there are tasks you are able to do without Internet, please prioritize those. Otherwise, you could work from home or from a coffee shop with an Internet connection until such time as the problem is fixed
Thank you for all the hard work that you do for our company. We appreciate your understanding and cooperation in this matter.
We will inform you as soon as the Internet is fully functioning again.
Chief Financial Officer (CFO)