Hi all,

In my environment I have 2 exchange 2013 servers : ex01 & ex02 in 1 DAG01. Recently my ex02 server has problem, some exchange service crash ... I'm still finding reason, maybe because lack of memory ... BTW I have a "Mailbox Database 01":

Get-MailboxDatabaseCopyStatus "Mailbox Database 01"
Name                      Status     ContentIndexState
Mailbox Database 01\EX01  Mounted        Healthy
Mailbox Database 01\EX02  Healthy        Healthy

When ex02 has problem, something happen with "Mailbox Database 01" copy on both ex01 & ex02, it cannot be mounted on boths. The status of them keep switching : Mounted , Mounting , Initializing , Disconnected... like this:

Get-MailboxDatabaseCopyStatus "Mailbox Database 01"
Name                      Status     ContentIndexState
Mailbox Database 01\EX01  Mounting        Failed
Mailbox Database 01\EX02  Initializing    Failed

Get-MailboxDatabaseCopyStatus "Mailbox Database 01"
Name                      Status     ContentIndexState
Mailbox Database 01\EX01  Initializing        Failed
Mailbox Database 01\EX02  Mounting            Failed

Get-MailboxDatabaseCopyStatus "Mailbox Database 01"
Name                      Status     ContentIndexState
Mailbox Database 01\EX01  Disconected        Failed
Mailbox Database 01\EX02  Mounting           Failed

Until I suspend "Mailbox Database 01" copy on ex02, "Mailbox Database 01" will mount on ex01 successfully, then "Mailbox Database 01" edb file on ex02 has "dirty shutdown" state, and I have to reseed "Mailbox Database 01" from ex01 to ex02 manually.

Get-ClusterGroup -Cluster EX01
Name              OwnerNode            State
ClusterGroup         ex01              Online
Available Storage    ex02              Offline

Get-DatabaseAvailabilityGroup -Status -Identity DAG01 | fl name,primaryActiveManager

Name                 : DAG01
PrimaryActiveManager : EX01

Please let me know if you need any information.
Thanks for your help.
Jack.

• Edited by Jack Chuong 1 hour 45 minutes ago

After re-seed the database status changed to healthy on EX02? Did you noticed any events on EX02 during the problem.