My customer is having a problem: We have 6 node mailbox in one DAG, Database Status Service Down on 2 node (1 in DC and 1 in DR). We have only public folder database on this 2 error node. Now all user of my customer's coporation cant connect to Public Folder, it very important with business work

We also check telnet to localhost on this 2 node error with 135 port, All most time we cant tellnet to this port. 

On EMC of 4 other Mailbox server we see Service Down with this 2 error node. But On EMC of 2 error node we see Healthy. 

Any body have experience with this problem, please share to me. Thank so much.