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. 

Exchange 2010 verion: 14.02.0342.003

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

Duplicate post:

https://social.technet.microsoft.com/Forums/en-US/df4b3f0b-783d-452d-b1d5-12f46f446410/exchange-2010-2-mailbox-servers-in-dag-have-problem-error-service-down-and-cant-telnet-locahost?forum=exchange2010