Exchange 2010 Database not mounting in DR Site

Dear Experts,

AD main Site:
2 x CAS/Hub Servers (with 1st server as file share witness)
2 x Mailbox Servers

AD DR Site:
1 x CAS Server (Alternate file share witness)
1 x Mailbox Server

i am in the process for testing failover to DC, i disconnected the link between DC and DR Site, i followed an article and all went fine.

my database is showing as dismounted, i gives me attached error when i try to mount it.

It seems that my active manager is server MB01 which is in DC and off.

i also ran shutdown cluster and started and took quorum properly but still database is not mounting.

Any help on how i can forcefully make DRC server as active manager when DC site is not accessible?
mount-error.PNG
MCIT-LibyaAsked:
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MASEE Solution Guide - Technical Dept HeadCommented:
Did you confgure Sites and services properly?
Did you configure CAS arrays on both ADsites?
Do you have ADC in DR site?
Did you configure one IP from DR site and assign for DAG?
Please answer these questions
MCIT-LibyaAuthor Commented:
Dear MAS,

sorry for the late reply, the problem turned out to be that when i check dag properties in shell it showed that DR Site servers in stopped state.

So i stopped dag in my main site from DR Site and restore dag in the DR Site, after that i managed to mount the database.

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MCIT-LibyaAuthor Commented:
i stopped dag in my main site from DR Site and restore dag in the DR Site, after that i managed to mount the database.
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