exchange sp1 ECP hang when one mailbox server is down

i have native exchange sp1

i have 1 cas server and 2 mailbox server

if join on ECP i see   total function and see mailbox server 1 and 2

but if shutdown server mbox 1 or server mbox 2= the ecp not responding

i close IE and reboot cas server but when open ECP the autentication working but menu is very slow..

and often block when select : exchange admin center/server/serverdatabase

i see eventlog and cas server tries to connect to the server off and loop.

I thoughtthat thecasno longer sawthe emailson the serveroff not that the whole system went wild

if restart server mbox which before was off the ecp immediatelyworking perfect

this happens is if I turn off the server mbox 1 or 2

thanks for help

March 20th, 2015 5:15am

i see problem

i have CAS1 and  mbox1 and mbox2 with DAG

the cas1 prefer connect with mbox1 when use ECP.

if power off mbox2 the ecp working but if poweroff mbox1 the ecp hang

if use powershell exchange and use command: Get-MailboxDatabaseCopyStatus

or Get-MailboxDatabaseCopyStatus Test-MapiConnectivity respond mbox1 also is poweroff.

if mabox1 and mbox2 is up and use command Get-MailboxDatabaseCopyStatus show only check

for mbox1 but not check for mbox2.

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March 20th, 2015 3:22pm

Hi,

Any server in a DAG can host a copy of a mailbox database from any other server in the DAG. When a server is added to a DAG, it works with the other servers in the DAG to provide automatic recovery from failures that affect mailbox databases, such as a disk, server, or network failure.

We can undestand more information from this document.

https://technet.microsoft.com/en-us/library/dd979799(v=exchg.150).aspx

Best Regards.

March 23rd, 2015 3:19am

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