You have an Exchange Server 2013 organization that contains the servers configured as shown in the
following table.
All of the Exchange servers run Windows Server 2012 R2 and are members of a database availability
group (DAG) named DAG1. Each server has a copy of all the mailbox databases. DAG1 is configured
to have a cluster administrative access point. The file share witness is located in Site A.
EX5 fails and is taken offline permanently.
You need to identify the maximum number of Mailbox servers that can fail simultaneously without
affecting the mailbox access of the users.
How many servers should you identify?
A.
2
B.
3
C.
4
D.
5
B is the answer. If there are 7 servers, then 3 could go offline without affecting anything. As long as a majority of 4 remains for quorum.
After rereading I see Ex5 is offline. So, we are left with 6 servers. With an even number left over (and no dynamic quorum) only 5 servers will vote meaning only 2 can go offline.
Keep in mind that they say witness is on site A so when ex5 goes permanently offline, the quorum majoriry will be 6 but witness will add 1 vote so will be same if ex5 goes offline or not, i vote for answer b