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Tien Ngo Thanh's avatar
Tien Ngo Thanh
Iron Contributor
Apr 20, 2019

How to Exchange can running on DC and DR ?

Hello     current environment we can Active directory two DC and DR and same site (not configure site) is default first site     and Exchange 2013 have 6 Mailbox Server in DC and 3 Mailbox server (...
2013
Exchange Server
Tien Ngo Thanh's avatar
Tien Ngo Thanh
Iron Contributor
May 12, 2019

Hello

      all exchange the same site and the same subnet .active directory only one site is "Default-First-Site-Name" .So the future if have DAG 2:2 then need one or two witness  server ? if one witness on DC then if all server DC down then DR can up cluster and DAG normal ?

Thanks

msExchangeDude's avatar
msExchangeDude
Icon for Microsoft rankMicrosoft
Jun 19, 2019

Tien Ngo Thanh the numbers in the 2:2 ratio mean 2 servers in one site, 2 in another, so really you just want a 4 node dag all in same site (4:0 DAG). In this case, you would only need the one FSW, he just helps break ties between even votes. 

  • Tien Ngo Thanh's avatar
    Tien Ngo Thanh
    Iron Contributor
    Jun 28, 2019

    msExchangeDude  : If i have 2:2 (DC:DR) and one FSW in DC then if all server DC Shutdown then DR must up cluster manual ? or must install alternate FSW in DR ?

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